Communist clones like Ubuntu eat into IBM's bottom line already. The question is rather would a lawsuit against a single Linux vendor render all Linux vendors unable to distribute under the GPL. According to leftist freaks, probably yes, but in practical terms, very unlikely.
Communist? Oh yeah, I forgot, the creator of Ubuntu is Russian. OMG EVERYBODY'S A RUSSIAN HACKER, RUN!!!
And I still don't understand the problem you have with clones. But you don't, just in certain circumstances, because I'm sure you'll be running out to buy the OS X clone Vista ASAP. You never were logically consistent.