For me, mourning has absolutely nothing at all to do with it. Period. Death doesn't bother me. It has to do with speculating as to the cause, which may lead to libelous behavior. I do not mean that anyone posting here would necessarily be chargeable with libel, I mean libelous behavior.
Let's take the Germanwings 9525 accident, for example. If a question asks something like can a pilot disable auto-pilot and intentionally crash an airplane, I might answer yes. If a question asks something like 'would a sane person knowingly do so', what do I say. I am not only not that pilots doctor, I'm not any pilot's doctor. If I say 'the pilot must have been insane' to do so, before any actual facts come out, I have done a disservice to that pilot, and in fact all pilots.
There was a (two days ago) accident where a young (16 year old) pilot was taking off solo, there was a nosedive by the plane, it crashed and he has died. Was it the engine? We don't know. Maybe a control cable snapped. Maybe it was pilot error due to too few hours and inexperience; or just maybe a 10,000 hour pilot couldn't have saved the plane. We don't know.
Immediately following every major air accident, we should expect a slew of questions more or less asking about the accident. We shouldn't blanket close them all. But speculation is best served by leaving it to (e.g. Fox news).
People have said here in other answers that the Germanwings accident was mentioned for context ... why? Is there no was to re-word the question so that no context is needed?
Asking if there were any prior accidents caused by suiciding pilots while using the recent crash as context, makes an implication that that accident was caused by the co-pilot committing suicide by plane. Before even the most basic of factual examination of the boxes were made or released.
Right now, in the mass media, it seems 'understood' that the accident was caused intentionally by the pilot, and that he had a history of mental instability to back up the claims.
What do we (everyone) do if, a year from now, the investigation concludes something totally unrelated, like both engines flamed out due to fuel starvation, or something? We'll have (probably totally incorrectly) castigated a scapegoat.
I know this is rambling, but it's how I feel. I'll try to clean it up a bit later.