I would LOVE a +/- system for media. There is a dutch website called dumpert.nl, and they use a "kudos" system there (similar to reddit's up down). Content that is good and received well by their community gathers positive points. Stuff that stinks, gets a -1. When sorted by the kudos, the top rated videos of the day are laid out right in front of you with a net gain of +1's to -1's. Very easy to see what is trending, what is going places, etc. This would be fantastic for our photo and video sections. Exactly like you said, no one person has the power to change a rating drastically. It will get the rating it deserves over time (be it in an hour, a day, a week...)
That being said,please please PLEASE do NOT do this to the forums.
I hate reddit, not for their members, not for their content, but for their layout. NS has THE best forum layouts in the game. I've been here a few years, and have been on countless other forums. Its layout, its simplicity, just everything about it works, and works well. Reddit is just miserable (for me at least), because logic tells me to read things in chronological order. They decided to let everyone as a group determine what I should read instead. Well, I don't want members to determine what I should see as the best replies, I want to decide that myself! And I do that by reading through, seeing the posts in the order they were replied, and rewarding the person that made a good comment with karma, or a nice reply to their post. Same for those that decide to comment in a negative fashion.
I can't read youtube comments for the same reason. You get some of the "member favorites" up top, then the latest replies, and the older stuff becomes archived. It's a fucking mess. TGR is a mess too with their VBulletin layout. There is too much information for each thread in their subforums, and each reply is huge. NS is great: A nice sig, a nice member identification on the side and signature, and clean, tidy subforum listings.
The karma system could be replaced with a thumbs up or down system, though. Again, no one person can greatly effect a member, and it shows true colors more easy than 1-10. I mean hell, I look at karma ratings the same way it would be in a point system. lots of positive (~6.5+ exchange rating) and they are probably a good contributor. Middle of the road (close to 0) (~4.5-6.5) and they contribute O.K. Lower or negative points (sub 4.5) and I take what they say with a grain of salt.
A complete overhaul of the forums would take a lot of time and man hours. Not to hate on what you guys have done, but there have been a few issues with what we have, that have gone quite a long time without answer or solution. I'd hate to see a large project be taken on, only to have more issues (what project doesn't?!) that take months and months to address.
The current forum system we have right now works really, really well. Why don't we address the small things to make it flawless and not worry about completely redoing every aspect of the site. Start with the Media sections, maybe karma system, and thats it. But for the stuff that ain't broke, don't fix it!
PS: I love what you guys have done here and I mean no personal harm with what I said. I know you guys work your fucking asses off day in and day out to make this place run, and I applaud you!