Oh, oh, he’s really pissed. 
On the one hand this is understandable, Bryan has also explained it clearly.
On the other hand, the term “endeavouros” is not legally protected as a brand - right?
Something like that does not cost little and would have to be defended in case of a serious incident, which costs even more. With “endeavour” one would have very bad cards anyway (well, one shouldn’t do something like that anyway).
Just having registered a domain has nothing to do with it.
Btw., which site is the original Lubuntu related?
lubuntu.net or lubuntu.me? Hard to say, right? And they don’t like each other. Lubuntu is after all a protected term.
In other words, it would be very difficult to stop any fan groups, websites or the like.
Whereby one really doesn’t have to chase after all social stuff.