I'm not fluent enough in the inner workings of EL&U to prove it, but I get the distinct sense that certain posters suspect me of downvoting them when in fact I haven't. None of the related questions above really deal with this issue, and it has me mildly concerned.
I wouldn't presume, so early in my tenure here, to mark someone down in any event (and feel it's unlikely I ever will), but in the instances where the downvoter gives no comment to accompany his action, I feel as though suspicions are raised generally. Maybe others feel the same; as a novice, I certainly do.
[There may be a completely rational answer to this -"someone can go to your homepage and check out your stats"- for which I'd be grateful.]