>>tonmoy+(OP)
There's really one thing missing from the guidelines IMO - "don't downvote for disagreement, downvote for offtopic/flamebait/inappropriate comment".
Well, this should be obvious, but it sadly isn't...
>>Pannon+Ch
But 'disagreement' is a bit vague. If I use a dwonvote (which isn't for totally inappropriate stuff) it's not merely disagreement, but because the comment has demonstrably false content for instance. I'm not sure what else I'd use it for, just opinion-based disagreement doesn't quite cut it indeed.