"Its things like this that make me realize how little I really know.." +8

The people who +1 stuff aren't the ones that understand the discussion, and the ones that do understand it don't +1, because why would they, it's obvious by reading the comments which ones are good and which ones are bad... It's a fantastic culture clash.

I don't know because I don't have the same problems (I make few posts on Google+ and receive even fewer comments when I do), but presumably, all the smart guys and girls already have each other circled and just ignore all the spam. I can't imagine Linus would even use Google+ if there wasn't an easy method of filtering the wheat from the chaff.