This is 2012 alright...
Rather than use the reactionary modern knee-jerk method of
threatening the bloke with assault, battery, lawsuits etc and
whatever other legal recourse is used because of the severe
injuries you have brutally and viciously received from all this
hand-slapping, have you ever considered to simply and nicely
ask him to stop doing it?
Thanks slasher and a toast to you Sir.
The rest should grow up and stand their ground like grown ups and not behave like 5 year olds.