[@chukklehed] The hero association isn't competent enough to even have TV cameras going in a danger zone, let alone know what goes on in them. Otherwise, like I said, Saitama would be S class already for both destroying the meteor (Which had the credit go to Genos), and killing that 500m tall guy. 
[hider=spoiler] The latter of which had his kill credit go to King, which is the only reason why King is an S rank hero in the first place.[/hider]
Everyone else doesn't have much of a problem with it, and like I said, no one knows what happens to the monsters afterwords. Saitama ripped up that seaweed monster to use as food, so there doesn't seem to be much problem with this sorta thing as long as its on a small scale. Heck, if this world has a fast food meat chain, whos to say they don't use monster meat? Doubt there is enough cows and other livestock in a monster filled world anyway. TBH animal has the final say as to what happens here, either Light gets yelled at again or nothing happens.

And obviously you haven't seen Rick and Morty.