This is something that I think is a bad practice.
When people answer bad questions(especially those with 50k+ rep), they are making the questions themselves more legitimate and giving them more views.
Often these questions are closed, not before people answering get a handful of votes.
Also, it seems to be a "stat stuffing" move. If you can be the first major contributor to answer even a bad question you are bound to get some votes. Even if the question adds no value to the workplace, it can be a quick move to get some rep.
Does anyone else feel like there is harm in answering bad questions?