during is poor form, negative marks to the pooner; but some sps will relax after and have little choice in the matter if slipped a date rape drug. a busy night for some sps is big $$ on hand, and if they are really careless you are looking at several days or a weekend's take.
i hear tell of from different areas that it can happen but is it urban myth or random fact.
as if the business wasn't hard and hazardous enough. never thought this would be one.