Thanks everyone for all your comments! Took me a while to react, sorry.
Yes, one of the basic ideas of Pinside is that it must be a positive site, with a good vibe. That does not mean you are not allowed to be negative here. I for one really HATE that obnoxious troll puppet in Rollercoaster Tycoon. There, I said it.
No seriously, there's a huge difference with being negative about something (disliking a game, disliking a theme etc) or just being negative overall (continuous trolling/attacks/derailing topics etc). I'm sure most of you know what I mean.
Okay, as for the Karma system. I'm leaning towards removal of the current Karma points system altogether. It was once meant as an incentive to participate on the site and post on the forum, but that's not required anymore, I guess.
I would like to replace it with something else though. Something like a reputation score would be a better way to see how much the community trusts a Pinsider. With such a system, you will no longer get points for a post automatically, you need to earn them by making good posts. Your peers can + or - a post or topic (thumbs up/down), which will add or subtract a rep point from your total. But there should be some limits to this. I like the idea of only being able to give out as points as you have received yourself. I also think there should be a daily limit of thumbs up/down you can give (avoid people thumb upping/downing every single post by limiting daily allowed use). I also like the idea of a special "problem solved/this post answered my question" marker which the topic starter can assign to a post in the thread, saying "hey, this post answered my question!" which will score extra points for the post author.
As for the FS threads, I'm not a fan of offering an option to disable comments on them. If you want to post a FS ad without getting comments on it, you will have to use the Pinside marketplace.
As for the moderation. *When* I get dozens of complaints about a moderator, I will definitely look into matters and could even relief someone from moderation duties. But in the end they are Pinsiders like everyone else, but received some extra rights from me and help out making sure the site rules are lived by. In my opinion, they are one of the reasons the Pinside remains a fun place.
Having said that, there are definitely differences between the way the mods handle things. It's almost... as if... they're human In a perfect world moderators would not be needed at all. I have always hoped the implementation of a good community (rep) system might enable the community to do most of the moderating duties by itself. The Tilt warning for flagging NSFW content is a great example and something the community is much better/quicker at then any mod could. I would very much like to take some difficult jobs out of the moderators hands and into the hands of the community, eliminating bias and differences in interpretation. The question is how to do this? Maybe I can tie it in with the rep system: if people have too many downvotes in a day they will be "banned" from posting for a certain time period? This will also make things more clear and less "random". Hmm, this needs more thought for sure.