Confirmation bias. It’s the same in most forums I follow; there is
always someone complaining about an imaginary person downvoting everything. Which is always bullshit because even if a couple of posts had one single downvote by the time the comment was written (though there is nothing to say whether this was from a single account), it is
never the case if you wait a bit.
I guess part of us really want to be against other people and the shady systematic downvoter fills that role. It is always stupid, though. Luckily we don’t get much of that here.