I'm used to the occasional 100 points or so disappearing from my rep due to deleted users. I grumble to myself about it and then get on with life because the site is about learning Japanese, not about gaining rep.
However, I just noticed today that I've lost 1,700 points due to one deleted user. This seems a bit extreme. It's going to take me quite a bit more grumbling to get over that loss.
Was this user deleted for voting irregularities or are we being punished just because they decided to leave the site even though their previous votes were all reasonable? If it's the former it would be nice to have some way of being informed of this. If it's the latter then the system seems a little broken to me.