Arete-that kind of begs the NSS question, which I don't think is an issue of any consequence in the markets, but yeah. Lots of BB companies have claimed a naked short, USXP being the most notable.
About half of the ScamWire 100 companies were reporting BB companies, and most of the (dismissed) Get Shorty suits have been by reporting companies. NUTK, JAGH, and GeneMax leap to mind.