Is it that bad to have friends who are WAY younger than you?

I really only started getting into online games when I was 16 and I got my first headset when I was 17. I have made friends in other online games who where anywhere from only one year younger to 10 years old.

I am 20 now and when I am in an instance with one of them like people will ALWAYS ask us our ages and threaten to report me even though I am just having a conversation about Star Wars or something. I can understand the lack of trust but, when other people in public talk about actual horrible things, it makes me upset.

It has gotten to the point where we will call each other on the headset but I will still be in game chat just to avoid the harassment.