Web sites are of great value to museums, with the potential to reach a far wider swath of the public for a smaller cash outlay than most forms of advertising. But what if the public can’t find your site? It’s a nightmare scenario being experienced by the UK’s Horniman Museum, which has found its site blocked by automatic web filters and its e-mails discarded by spam blockers. Why the nasty treatment for a legitimate art museum? Try saying the name a few times, and you’ll get the idea.