Got a favorite poem you'd like to share with friends online? Beware: you could get your service provider busted. A draft version of proposed legislation makes bulletin boards responsible for copyright infringements on their piece of the Net. Needless to say, companies like American Online and CompuServe aren't exactly pleased with the idea. It's like making "the highway responsible for the reckless drivers that use it," protests Kent Stuckey, general counsel of CompuServe. On the other side: copyright holders like music publishers and publications. Bulletin boards "are profiting" from the work of artists, says Susan Mann, attorney for the National Music Publishers' Association. Public hearings on the issue are being held this month.