User blog comment:3primetime3/Disabling Achievements???/@comment-27403314-20141016062708

Note that there is no saying that someone must be actually care on the leaderboards and achievements, it's optional. So if someone doesn't like the option, just ignore it. If someone does care about it, then don't take it too seriously. But if someone does take it too seriously by spamming, then just block that user.