I used this for a very short period of time as a stand alone addon. If you rate a web page while logged in, you are essentially telling people "I've been on this site", so naturally I saw it as a breach of privacy.
Apart from that, I've been using Adguard since v6 release (which fixed the problems I had with it) and left WOT enabled since to a certain extent, it was helpful. Ever since WOT was exposed, I deleted WOT from Adguard and never looked back. With WOT gone I have not noticed any decrease in protection given by blocking malicious pages or popups - Adguard filters alone tend to be better than many AV web blockers.
In short, one you abuse my trust, you will not get it back again. While the Adguard WOT extension is different, I think Adguard should drop it entirely.
If you made a game and the game crashed when doing this or that, that is fine, it's just a game. If you make security software and don't take it seriously enough or you are in it for yourself rather than to protect your users, you could end up seriously hurting people. For that reason, I have no difficulty turning my back on WOT. Mistakes happen but WOT knew what it was doing.