I'd say cleaning up some webs is a small price to pay considering all the good he does. He helps people, stops crimes, saves lives all the while never asking for anything in return. All they have to do is clean up some webs. I'd say that's a decent deal

What if (assuming it isn't biodegradable, but I'm pretty sure it is) the New York tourist board collected up all the webbing and sold it online or in the city as souvenirs? He's internationally known so there's sure to be a market for it and that revenue could be used to offset the clean-up costs.

Ok, settle down there little anti Spidey. Contrast your comments to the volume of violent criminals that he stops and apprehends, he should be paid. The webbing is only left in unfrequented areas, and usually high enough not to pose any real environmental issues for anyone, plus it is a visible reminder to all ne'er-do-wells that he's around and watching, I'd say let it be. If nothing else, the webbing of that tensile strength could be recovered and recycled into other useful materials.