A crime is a crime and should be treated thusly. I'm not saying that they don't have better things to do but if this particular thing is becoming a problem it should be solved.
Look at this way, Philadelphia is starting all sorts of campaigns to bring business and people into Philadelphia- even marketing the city's name to gain revenue. Now, that in mind, a group of people that engage in illegal and immoral activity in PUBLIC in the very places that are trying to improve are making this behavior known- in Philly Mag., and web sites etc. . You are a resident, a business owner, a politician, etc., what do you do?
note, I'll bet they're not spending money while in those bathrooms