You're a junkie?
IMO this is just crap. if 7 is average and 5 is bad then what the hell is 1,2,3 & 4? It's people that use scales like this that show us that introducing a scoring system will end in a big bag of fail.
I don't mind a score, I really don't with decent reviewers but so many people have fucked up scoring system 6/10 mediocre crap or 12/10 WTF??
As would I if it was consistently used correctly. It wouldn't be though and we'd get some pretty crappy results if we made it that reviewers had to rate their reviews (well I really fucking hated this piece of shit album but I like the guy and appreciate that he is trying something he wants to do so I'll still give it 7/10 despite its crapness)
I would too if I had a tried and trusted reviewer but that still doesn't equate to making reviews needs a score.
I would go for Basilisk's idea if people would ever be able to follow it. However they'd fall into your second take and that's why I reckon this should be ignored.