The quality on TVTropes comes from the same place as the quality on Wikipedia: obsessive nerds who want things to be right. Like Wikipedia, TVTropes has successfully set up a filter such that the good stuff tends to stick more than the bad.
Of course, it has the same problem with people wanting to add garbage as Wikipedia, as Desrtopa points out. But the overall slight bias to good seems sufficient to grow quite remarkably high quality.
The quality on TVTropes comes from the same place as the quality on Wikipedia: obsessive nerds who want things to be right. Like Wikipedia, TVTropes has successfully set up a filter such that the good stuff tends to stick more than the bad.
Of course, it has the same problem with people wanting to add garbage as Wikipedia, as Desrtopa points out. But the overall slight bias to good seems sufficient to grow quite remarkably high quality.