Well... I don't know about the worst thing, but there's some pretty bad things...
Well for one there's school. All of these popular girls and cliks and popular guys... at school, you're not popular if you're not skinny, or have certain clothes or wear a crapload of makeup and work waay too hard on you're hair every morning.
Just people being all popular and stuff... all this drama... just isn't worth it.
When I lost a friend to cancer. I really got mad about it and I fought people was just really mad. Got suspended from school for 2 weeks for the fighting, and had to make many excuses. Glad my girlfriend is better in supporting me trough it then the teacher who suspended me.