This is what "the customer is always right" turns into.  I've had people think yanking on my apron strings to get my attention while I was serving another table as completely appropriate behavior.  I got in trouble even though the table I was serving told the manager that I was busy serving them at the time.  Who would yank on a server's clothes while she's busy?  A balding fatass wanting to impress it's fatass date that was dressed like a $2 ho.