Definitely harmful.... this is why so many guys are shooting those strange bows with the bent limb tips. They were originally nice longbows, but were stood in corners too long and warped into recurves... Some bows subjected to this kind of torture get the bent tips, others just kind of buckle in the middle and become RD's. Too bad... I could just cry when I think of all those beautiful true longbows subjected to this terrible torture....
sorry... haven't had my morning coffee yet... 8^)
It isn't a good idea, though. Like many others, I use pegs