DIN! DING! DING! We have a winner...that was the answer I was looking for.
Thing is, my brother-in-law used to work for Wal Mart in Loss Prevention. One day, a gentleman decided that he didn't want to pay for a $100 tool box, so he tried to steal it. When my brother-in-law and his partner confronted him about it, he threw the tool box and struck one of them in the head. Needless to say, they both proceeded to beat down this unfortunate soul.
When it was all said and done, my brother-in-law and his partner are out of a job, and...get this...the Manager tried to get them to sign documents stating that Wall Mart was not responsible for the shoplifters injuries (after he just fired them!). He signed in very big letters 'F U' and walked out.
Now I know that they can't detain you without the risk of being fired, I would simply ignore the demands.
Another person who thinks they are above everyone else thinking abusing employees at Wal Mart is okay.
Every time I see a scumbag abuse a greeter I feel bad for their kids and spouse.
No decent human being does this.