For households with more than one member, one's Alexa contacts are pooled across all of the devices that are registered to its associated account. However, within Alexa's app one is only able to start conversations with its Alexa contacts.[50] When accessed and supported by an Alexa app or Echo device, Alexa messaging is available to anyone in one's household. These messages can be heard by anyone with access in the household. This messaging feature does not yet contain a password protection or associated PIN. Anyone who has access to one's cell phone number is able to use this feature to contact them through their supported Alexa app or Echo device. The feature to block alerts for messages and calls is available temporarily by utilizing the Do Not Disturb feature.[51]
If you think you’d like a briefing in the future, but not now, just toggle it off. If you want to permanently disable a Flash Briefing skill, you’ll need to head over to the Skills section in the app and then tap Your Skills.  Find the skill you want to disable and then tap Disable Skill. You don’t delete the skill, which makes sense since nothing installs on your Alexa device.
In November 2018, Amazon sent 1700 recordings of an American couple to an unrelated European man. The incident proves that Alexa records people without their knowledge.[76] Although the man who received the recordings reported the anomaly to Amazon, the company did not notify the victim until German magazine c't also contacted them and published a story about the incident. The recipient of the recordings contacted the publication after weeks went by following his report with no response from Amazon (although the company did delete the recordings from its server). When Amazon did finally contact the man whose recordings had been sent to a stranger, they claimed to have discovered the error themselves and offered him a free Prime membership and new Alexa devices by way of apology.[77]
From that point on, simply plug in the Echo device into a regular 110V. wall outlet, it comes with a plug in adapter. There are no batteries in this device, although some have them. A NOTE HERE" YES, YOU CAN UNPLUG IT WITHOUT IT LOSING ITS BRAINS AND REQUIRING REPEAT SET UP. So though not specified anywhere I read it evidently has some on board nonvolatile memory built in that will allow this. ( i spent several research sessions attempting to find this out, and finally had to bite the bullet and just try it. ) I moved it from one room location to another and within a few seconds it greeted me and said it was operational. NOW I AM ONLY AN OLD GUY WITH PRETTY GOOD HEARING ABILITIES YET, (NOT EXACTLY AN AUDIOPHILE ) BUT WITH DOLBY DIGITAL SOUND, THIS IS ONE NICE SOUNDING SPEAKER SYSTEM,

**UPDATE** I discussed this issue with Customer Service who, by the way, have the best Rep's in the world. Their engineers reviewed my data and concluded the sounds being recorded were coming from a TV in the room. At first it was hard to agree with them but after I listened over and over to a few of the recordings it was apparent it was from the TV. My Bad!! I'm back to being an Echo fan. 😊
Amazon blamed the incident on "human error" and called it an "isolated single case." However, in May 2018 an Alexa device in Portland, Oregon, recorded a family's conversation and sent it to one of their contacts without their knowledge. The company dismissed the incident as an "extremely rare occurrence" and claimed the device "interpreted background conversation" as a sequence of commands to turn on, record, send the recording, and select a specific recipient.[78]
He's also exploring, BY HIMSELF, different commands for Alexa. I've heard him ask her about the weather, baseball scores, etc. THIS LITTLE ITEM IS A TRUE GEM FOR SENIORS!! I love mine just as much & the quality of the sound thru the Echo is AMAZING for listening to music. I'm VERY PICKY about sound quality!! I have Bose speakers hooked up to my TV & have Bose ear buds as well. The quality of the sound from the Echo is just as good as Bose speakers!!

It's been a game changer!! My Dad struggled, even with the app on his phone to control the lights. Now that we have a Dot in his bedroom & an Echo & Dot in the living room, he's very easily learned how to ask Alexa to turn on the hallway light, his bedroom light when he's going to bed!! NO MORE STUMBLING AROUND IN THE DARK or trying to remember where he put his flashlight!!
There are concerns about the access Amazon has to private conversations in the home and other non-verbal indications that can identify who is present in the home with non-stop audio pick-up from Alexa-enabled devices.[69][70] Amazon responds to these concerns by stating that the devices only stream recordings from the user's home when the 'wake word' activates the device.
By default, Echo devices use “Alexa” as their wake word. While the device is constantly listening, it only starts tracking and analyzing what you say next after it hears “Alexa.” It then pulls up the relevant results. However, if, say, someone in your house is already named Alexa, you can change the wake word to something else: Amazon, Echo, or Computer.