I'll add another argument to keep FF on by default (that is, you can damage your buildings).
I just played on a server (I think it was satgnu) where building FF is off, and voting is disabled.
An idiot came, changed his name to that of a honest player, and started acting stupid. At first, he waited for humans to reach stage2 and enjoy themselves. Then he started doing preparations. He moved one telenode to outside base, and deleted the other along with armory. He moved the telenode outside base because he wanted aliens to eat it. This way, he isn't mentioned in logs as the one who deconstructed it.
Then he spammed base with turrets. He would occasionaly build and deconstruct a telenode, an armory, or healing pad just to tease and annoy humans.
At one point, when it was obvious to everyone except dumbest aliens (they said GG at the end of match) that humans have a saboteur, I suggested that humans teamkills the reactor to end the suffering and start new match. It wasn't possible because FF was off. The idiot even said he purposedly chose this server because building FF was off.
Teamkilling the reactor would annoy the saboteur. Such punks typically want the game to drag on forever, and tease human team with hope. Starting a new match (teamkill the reactor on servers with voting disabled) is at the moment the only way to restart match.
By the way: most probably the reason why there are so many servers with voting disabled is:
- because you can initiate votes forever (no limit to, say, 2 per player)
- because it takes 1 person to pass any vote, as long as other people don't care. And this is very common. You don't need any specific percentage of players to pass anything, all that matters is that vote gets 1 more "yes".
Result: griefer's paradise.
Wolf:ET requires percentages. It makes it hard to pass truly desirable votes at times, but otherwise works very well. And if one team really has much better players than the other, the vote for xp shuffle eventually is passed on 2nd or 3rd try.