**Steal comments that answer the question and post them as an answer.** If it happens enough either the misguided commentators will be annoyed enough at the "lost" rep to give outright answers next time, or no one will notice / care and you'll help the community and... oh yeah, get some rep.

BTW, I stole this answer from Jeff Atwood's comment on sysadmin1138's post, so you should upvote this to annoy Jeff.