You’ve made yourself known to children, and those who know no better way to spend their time than on the internet. This sort of thing happens, but usually dies off after a week or so (provided you don’t provoke them further). My suggestion is to wait it out.
Yes, according to law minors can use online services starting from 13 years old in the US, and 16 years old in Europe, ideally with parental supervision. And we try to be inclusive.