why does everyone have cartoon pics as their facebook pics?

Just like how all the girls were trying to end Breast Cancer or domestic abuse by making their FB status a sexual innuendo about liking their purses at a certain spot. For example "I like it in the bathroom". I have no idea what that accomplished, but this gave me a chance to post megatron as my FB picture.

If you want to use Megatron then use him. Don't pretend you're doing something good for the world through it, though. This is largely offensive to the people who are being abused. Luckily their parents don't let them on the internet so they aren't aware of this travesty.