Like this poor guy for example. WHY?
http://www.ozbargain.com.au/node/70207#comment-872583
Do the mods have any stats on negative comment voting habits? Are particular people maxxing out their neg quota every day? Is it a small bunch of people doing it? I bet a million dollars they don't post anything, deals OR comments.
Currently there are 2 people voted -1 on that comment and 1 voted +1. Not sure whether it is a case for "negative votes against COMMENTS getting out of control".
However yes I do agree that there are individuals abusing the -1 votes, which is currently a privilege every single user have on OzBargain (except max 5x -1 votes per 24 hours, and no neg votes for those in penalty box).
My plan is to move the capability to vote -1 (on deals as well as on comments) to become a privilege, which will only be granted to users with enough reputation. Well, some backend model and algorithms need to be designed and thought through, code needs to be written and tested, etc. But from recent discussions I'll try to put that on a higher priority.