I've only been 30 for a bit, and just went to the tribunal... Really I think it would be nice if we had just a simple positive review button for after matches, to give a counter to a lot of not so sincere reporting. I would positive review the hell out of a lot of people I come across. Whether its a more pro player giving tips to someone else on the team instead of raging, or someone just being a tough opponent who happened to not be a **** too.
I remember when I started playing about 2 months ago, having never played dota or anything like this, I sucked pretty hard. I faced a singed in 3s that disowned me, who happened to be high ranked but was just pub stomping. After the match he gave me a handful of tips about my build and my play, which really helped. Players like that should get something for being just generally awesome.