On a different but somewhat related issue, I think that sometimes the somewhat competitive leaderboard system can encourage counterproductive behaviour which could be a factor in cases like the above. There is someone, for example, on iNat.nz, who I won’t name, but who has suddenly shot to no. 1 in our leaderboard for identifiers. Looking at his IDs, I am certainly finding misidentifications, but I don’t know what proportion. Maybe they think that the error rate is low enough to still be useful, and maybe they are right, but I am a little bit uncomfortable about what they are doing!