All metrics (number of votes, number of views, number of comments) that could be used for selecting content or for (semi-)automatic curating can and will be manipulated as soon as there is the slightest chance of these metrics' influencing rewards. It would also be a problem for my proposal here.

I'm not sure we should let that stop us as the threat of manipulation can kill almost all initiatives, leaving us powerless. Maybe it would be better to just do it and worry about manipulation later, and then strike down hard on any and all manipulators we can find.

Some will argue that the code is the law, so manipulation beyond intended use is allowed, but I don't find that very convincing.