bathroom stall grafitti

I don't know how many people know this about me, but I adore bathroom graffiti and find it really interesting and sometimes very beautiful.
I have no idea of the caliber of the scrawls on Men's bathroom walls, I guess I may have to check it out, but there is a distinct phenomenon that I'm noticed in the Woman's restrooms.
Inside the stall: Women are alone and can write whatever they want. They allow their insecurities to rein and take over. Things in the stalls are usually "I had sex with your boyfriend Molly! FU: Kate" or "fat bitches, stop eating, you're disgusting!"... you get the gist. They are negitive, very hurtful and usually personally aimed at someone or some group.
Outside the stall: These are very different. Its rare to find a posting about someone's pubic hair, legnth of someone's penis, infidelities, etc. What you find on the outside is chipper and very surface. "Nursing School 2008!!" "Jack and Sara 4eva" "Love yourself for who you are and don't look back." These are very general and light hearted.

The psychology of it really intrigues me. Its so fitting for how many girls are. On the outside where others can see, being positive and bubbly and surfacy, but in privacy, grabbing that random pen in their purse and scrawling something hurtful while preforming one of the most personal of acts.

On this photo: I decided to take this photo and post it because it is one of the super rare ones. It includes God, but then a derogatary comment. So strange for bathroom posts... and it was found on the outside.