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Depends if you are building a new rep system, or just removing it from the UI. Removing rep would be easiest, building a new one much more complex.

Perfecto. About how much do you think it would be to just remove rep? And do you think people would want to DDOS the site if it started gaining popularity (can that be mitigated)?

Hard to say, it varies greatly not on the work but the person doing it.

Removing REP from the UI is one thing, but you also have to deal with the hiding comment behavior as well.

You can use CloudFlare to mitigate most low level DDOS attacks, but high level ones would require a lot of cash (DDOS protection is very expensive).

I think you would need to do a lot more than hide rep to get a front end that would be popular.

Would it be relatively simple to flip rep (and the automatic hide post) behavior?

I mean, make positive rep act like negative rep and negative rep act like positive rep?

And, just a question, my user icon just disappeared, does this have anything to do with me getting downvoted, or is it just a random glitch?

not sure why you would want to flip rep.

Yes there is a problem and it is being worked on. Should be fixed soon.

The idea of flipping rep would be for people curious about what is being downvoted the most.

Just on the technical side, as far as you know, does it seem like it might be feasible to simply reverse it (on the front-end)?

If you look at beta site you can see there are flag markers. Look for the green and red dots. More dots means more flags. Also flags will not hide content like it does now. Would need to be negative rep to hide by default.