I had a real winner walk into my work area.... he walked up to me and complained that the area stank.

The guy had ducked under "CAUTION" tape, walked passed a sign I had stuck up which said "HAZARDOUS FUMES. DO NOT ENTER" and the fact I was wearing a respirator didnt make him stop and think..."hmm maybe I shouldnt go in there".
So.....going by this example, I dont think a little thing like bad manners is going to stop these people.