[This is not a question, but I've heard that's no problem on Meta. Also, it might be a dupe, but I can't find anything like it.]
One of the things I've noticed on SO is users who come in, answer one or two questions with detailed, expert answers, and get no votes-up whatsoever (because they're not in a popular area, time-of-day) and never come back. I've seen tons of these, but here's one that I saw today in my touring.
I think that this is bad and cannot think of any easy ways to solve it aside from voting a good answer up when I see it, even if I don't have time to verify it.