I believe the implication is "I am doing you a favor by spraying graffiti on your apartment building, because that will cause your rent to decrease."
I don't know if this is actually true, but that's what I take to be the intent.
So it's utility maximising for renters, assuming they don't get caught and the time penalty isn't significant, to deface their property or those in their area so that the property is less attractive to others, assuming they don't value the original state aesthetics of the property relative to the defaced state more than the price differential?
Another month has passed and here is a new rationality quotes thread. The usual rules are: