She is strapped to a chair because if she is not, she poses a danger to herself and the other kids -- flailing around, running away, will NOT listen. I have a high table so she is in a booster seat anyway, and normally I don't strap it unless she is already throwing a fit.

MickyC, I like your advice. I think I will give it two more weeks, but I am going to be really honest with the mom today at closing time and let her know that this needs to be stopped.