Cantoresq:
Perhaps people have better things to spend their money on, like tuition? I think even you agree that paying tuition is better than paying some illegal to mow your lawn.
Agree with nameless on the signs.
The point is valid though, we should be better than others and make sure to clean up after ourselves, not to do so is a Chillul Hashem.
BTW, this may be part of the “bungalow mentality” that you are off for the summer and why should cleaning be any different?