I dont see much of a difference myself. A guy hunting near crop fields is taking advantage of a deers stomach the same as a guy throwing out some corn. The crop field might benefit wildlife more than the corn pile but theyre both there to bring in deer.
Some folks just dont live in places where a food plot is possible either because of property sizes or types or they dont own land. I'm one. Most of my bowhunting is residential & while I dont bait everywhere I'll do it where it seems likely to pan out. It must be nice to be able to place a stand anywhere you want in an area but not everyones got it like that.
If your adamantly against baiting you ought not hunt near crop fields IMHO.
That said, if its legal I dont give a rats patootie what someone else does.