If an attacker is disabled due to the effect of an omicron mine or a thetacron mine, does it count as a kill for the defender?

I have no idea...but if it doesn't, it should. Or perhaps players could have an additional "defensive kills" stat. That could also take into account killing other players that are attacking you, but without being killed by any special effects. It would be a nice stat to have, and could provide a little info about a player too - if lots of people have died trying to fight them, it suggests they have huge defences.

There could potentially be missions based on this stat too, such as defending a planet against an enemy siege.

I believe one of my player kills in my stats was from a thetacron mine. I am sure the deaths from players goes up when you are killed attacking someone.

That would be nice if you are credited for the kill while defending

I'll test that out later, find somebody chunky to pancake on.

I know if someone dissables themselves while attacking you, you do get credit for the kill. I would assume this would hold true if it was from a trap as well.