Apparently they happen here in Boston all the time:
I saw one go down today in the oldest city park in the US. It was pretty lame.
There were two kinds of people there: little kids and 20s-30s guys who put way too much time into their shields, costumes and bags of waterbombs.
As a friend of mine with me put it: a virgins-only event.
Not Unreasonable 
Your friend is mistaken. Maybe you should loosen up and have a little fun!
Wait, you mean I can’t repeat a haughty, mean-spirited joke on my blog and get away guilt-free?
What kind of Internet has this become?!