How difficult would it be to have an age verification so as we could possibly block anyone under 21 who follows us or we follow etc.
As Twitter doesnt enforce age you couldn’t do it using their system so basically in short you couldn’t…
You could technically setup a webpage that asks for self verification, and then asks someone to provide you their twitter handle which you can then keep in a database to follow an account and then hope they follow you back but you would need to keep all tweets private and block anyone not on your self verification database.
So in otherwise…technically you could but it probably wont work.
why do you want to do this anyway? for alcohol or sex?