Feeding pigeons on the block

Somebody in Davis Square has some issues with an unknown neighbor:

[O]n the side street where we park, people throw tons of bread, bird seed, and other random food items [once someone left an entire plate of spaghetti] out several times a week in order to feed a flock of pigeons. As it is, it's pretty disgusting. The street and sidewalk are covered in bird poop and you risk that happening to your car if you park in the four or so spots that make up the "pigeon zone". In the last few months, the feedings have increased and the pigeons are everywhere. Now we're starting to see rats in the neighborhood, presumably eating all the food that gets strewn about.