I and the guy I work in the same office with punch our monitors all the time, to the point that it hurts. The dumb****s that send in data **** it up every single day and it really becomes annoying, especially when it becomes backed up and then other people dump more stuff on us that needs to be sent out.
So they seem pretty resistent; though we're going to split the cost for a punching bag in the office. Can't wait!
db