I was bullied when I was a teen and when I worked at a library, teens always caused trouble because they were bored. Now I'm 27 and I'm still nervous whenever I walk past a teen, especially a group.

I know that the people I have had negative interactions with are the minority and the majority of teens are great, but I always tense and get anxious even if they are on the other side of the road and not paying me any attention. 

(I'm sorry if I've written this in a really weird way but I wasn't sure how else to phrase it!)