i disagree. people naturally share things they find cool, we're a gregarious species after all. karma just encourages people to churn out low effort content, and cynical reposting (which i know heelpr says is important, but it's been the reason i've left many subreddits)

i do agree, however, that it's a way to spot trolls; but i don't think it's the best way and it's very easy to rack up spare karma by, wait for it, karma farming. conversely, i think good moderation is a better method than just looking at a user's total karma