Wow, what a bad idea :o So over a year I tried to repair database by downvoting some completely wrong answers, I have never abused it and tried to think twice if it was really necessary... and now I've been punished for it and lost over 30 points!
Editing should be good in case when we should add some additional information to the good, but incomplete answers. If anybody wrote something completly incorrect and misleading and he doesn't respond to any comment, we should feel free to downvote. It shouldn't be our job to completely change wrong answers.
If anybody answered "no, [explanation]" and the correct answer is "yes, [explanation]' then it should stay as it is. We shouldn't change meaning of the answers.
Seems that now I should find all downvoted answers and unvote it to not loose any points, no matter if the answers were wrong.
First of all this kind of changes shouldn't be retroactive, because in the past you asked people to downvote wrong answers to make database more valuable.
In my opinion it is another way to grant spammers and punish users who took care of the TibiaQA's content quality.