It isn't legal to photocopy them for personal use/retypsetting so that you can play them? Personally if people kept stealing my expensive music I probably would photocopy them and not use the originals, but that's probably illegal and if people keep them then not very ethical. :(

I think copyright laws have got stupid, they were supposed to be fair in recompensating the original rights holder, not restricting people from fair use afterwards. The complexity in identifying copyright means a lot of people can't use good stuff 'in case' it's copyrighted.