Thanks, this is new since my kids were under 13.
I understand why parents let their children lie in order to avoid social exclusion. Kids can be very cliquey and being excluded hurts.
I counseled my children that it is immoral to misrepresent yourself to someone in order to get them to give you something they otherwise would not (or are prohibited by law from doing so). I still remember my (now 24 year old) daughter gleefully signing up for Facebook on the morning of her 13th birthday.
Obviously they can just set up their own fake FB account and lie about their age (which frankly I already told her to never sign up to anything with any real information) but the rest of their friends need to as well for it to be of any use. At this age, we're not there yet
(0) https://messengerkids.com/