Is slashdot's glory fading, or was 6,000 hits an hour a catastrophic event years ago? I remember "slashdotting" being a regular phenomenon. CoralCache and Google's cached pages were the only way around it.
Nowadays, its core audience seems to have rallied around some strong niches like YRO and Linux. For example, "Ask Slashdot: How would you fix the Linux desktop?" was started on Friday and already has more than 1000 comments (http://ask.slashdot.org/story/12/09/07/1720206/ask-slashdot-...).
In any case, the most commented stories where all political nature, even ten years ago: http://slashdot.org/hof.shtml
If a server get 6000 hits an hour, that is less than two accesses per second. If a server can't handle that, then I'm not impressed.
They complaint is basically about the name Wikitravel. They claim trademark on the name and are upset that the forkers are using the name to promote the fork in a way IB feels misuses their trademark. They also throw in unfair competition and a couple other things.
At no time did we even consider using the name "Wikitravel" for the fork. On the forking email list, a recurrent problem has been participants suggesting a new name. The plan was do deal with names last. Now that we are moving to Wikivoyage first, a cleanup pass is being performed to remove "Wikitravel" from all text and maps.
IB is just throwing stuff at the wall to see what might stick.