It isn’t in fact LingQ giving the wrong translation, but various users that have added incorrect definitions for certain LingQs. However, even if you chose an incorrect definition for a word, after seeing it enough times you would start to realize that it was incorrect.
Implementing some sort of rating system for User Hints would be a significant project, and that time would be better spent on the long-awaited rating system for lessons, so for now we’re likely to leave it as is.
I personally look up words even if there is a user hint, but maybe it’s just my preference to see it myself rather than go off of what someone else says.
I noticed the very first day that I used LingQ that some hints were “wrong”, but then I considered that some of the hints are probably correct according to the context of the podcast wherein they were first heard.
@hape - That is a good suggestion and something we have considered doing in the past. Perhaps some way for our editors to remove strange hints they come across. We will consider it.