I mean, yeah. This isn't true of everyone. But for a large portion of people, getting downvoted feels bad. Maybe the "proper" view of karma should be "the karma I receive is merely an indicator of how valuable/accurate the comment is, and I should adjust my view of that comment accordingly." But just because something is irrational doesn't mean I can change it, or that the effects aren't real. And this is fairly common, from what I can see.
As for the "valid expression" thing: It gives too much power to a single individual over the type of content that is here. From what I and some other victims of downvoting can tell, it is the action of a single, well-known user who has decided to downvote people who express a certain view. I am fairly confident (>80%) that at least a few people have been driven off this site from mass downvoting.
What this means is, one person can affect who is on the site in a somewhat substantial way, even if the community does not agree that this is a bad view.
(If you want, you can PM me for more details.)
I have also been block-downvoted a bit (at least it looked that way). And it doesn't feel good. No doubt. But it doesn't pay rent to cry over it.
The voting mechanism is a technical means to heavily structure transactions of influence, status and visibilty. It is comparable to money or the ability to use a phone. Sure. These do not stand in isolation. The technical means are used in conjunction with social norms and customs. But you can't expect people to not (try to) use the means available. And some technical means are just not easily policed by social n...
Below is a message I just got from jackk. Some specifics have been redacted 1) so that we can discuss general policy rather than the details of this specific case 2) because presumption of innocence, just in case there happens to be an innocuous explanation to this.
So... thoughts? I have mod powers, but when I was granted them I was basically just told to use them to fight spam; there was never any discussion of any other policy, and I don't feel like I have the authority to decide on the suitable course of action without consulting the rest of the community.