Yes.
However, it might be the same software, but I doubt wikipedia was written to be a game source reference =)
The thing is, I can tell you exactly what will happen if players (who have an own interest in i.e. giving out spoilers and so on) will have full edit rights:
-> spoilers
-> spam
-> bad words
-> chat talk
if you don't think so, check the village places, clan halls, whatnot.
I will have all hands full to correct entries, search for inappropriate stuff and so on.
It is MUCH safer this way, because this is not an information source on just something, but a game ...
if you want to spoil the fun, and make a "how to play SL with all the spoilers you need" I can open the wiki for all....
I can guarantee you the results
we can do a little test when enough is in the wiki to move to the normal address instead of beta.