I think making votes public is a baaaaad idea, either it's going to up the agro or result in everyone voting each other "good" so that they don't get a bad rating themselves (which is pointless). As it stands if users want their feelings known they can leave a comment. It's also difficult considering people interpret the rating system differently- In the past I've rated comics "okay" even though I thought they were "good", but didn't feel they were on par with the comics I've rated "good". The other question is should previous votes be revealed or removed (like when the comments went public). The former isn't really fair to the people that voted assuming it was in confidence, the latter will completely screw up the top-rated list.
A usermap would solve the problems of people that share an ip- basically it tracks every account/ip that has been used in conjuction, and maps out any relationship between them. What Brad does from there is up to him.
No matter what's changed, if non-donors can vote then people can get around ANY system one way or another. Proxy ip's aren't hard to set up. And to be honest anyone petty enough to do this sort of thing is going to be the sort of asshole to go to any length to do it. And it's not people bumping their own scores that worries me, it's some turd voting down other people's work using 30 accounts.
I think what we really need to ask is - What good can come of this, and what bad can come of this?
There's a lot that can go wrong, and the only positive I can see is that it might get us some more regular users. It could also drive away a lot of the current regulars, or even ruin the site for us all. Every now and then a flame war crops up as it is, if this doesn't cause more it'll certainly make it worse when it happens.
The other thing to think about is that short of changing nothing but opening up voting for non-donors Brad is going to have to put in a lot of work making the changes/fixing bugs etc. Even assuming he wants to do this, is this really what we'd most like him to be doing with his time? I can think of a dozen other features off the top of my head I'd rather see- ranging from cusomisable "favourites" drop down in the maker interface to a html editable user profile page to extra panels in our comics.
Brad PLEASE think this through and make sure you know exactly what you're doing before you do it.
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Dinosaurs had eggs bro, the chicken came way later.