One way to get out of a parking ticket

I was going to say something about this cold this morning, but it was only about 15° here, which means it was probably -10° in Chicago and Wisconsin. Anyway, I went out to my car and found a parking ticket under the wiper blade. I thought I'd gotten home late enough that it wouldn't have been illegal. Then I read it over and notice that it's not even for my car. I think it was on the car parked behind mine yesterday evening. That means that its owner was so incensed at receiving a ticket after being parked all day in a clearly-marked truck loading zone that he just left it on my car instead. WTF, man?
So, should I contact the city about it or just throw it away?

...Actually, I just did a bit of Googling. Baltimore City can be a nasty place for unpaid parking tickets, to the tune of several hundred dollars in additional fines, plus booting. So maybe I'll just let this go.