NSFW: A Note on the Back of This Was Left on My Car…WTF?

Remember that 'thing' left on my car a couple of years ago. Well, now this note! A girl could get a complex.  WARNING! It's not pretty....

Soooo, I helped a friend out with an auction for her sister battling ovarian cancer. It was a great night and they raised a lot of money to help with medical bills.

I got in my car drove home (not noticing the napkin on my back window). That's when Jen said,

What's this?

Indeed...what IS this?

There was a napkin that had written profanity on it directed at presumably me.

Now, in full confession. The only thing I could think of is where I parked. I parked in a USM lot. But it was at night and I thought it was okay. To be honest with you, I would have rather had a ticket. But also, I don't even know if it was that...because as you can see - it was a pretty general note.

I am sorry if I screwed up your parking.

If it wasn't that...WTF with the note? What the hell did I do?

It was bad enough to have that THING on my car...but now this nasty note? I'm not sure what I'm doing wrong here....