Some users trying to build up their reputation answer a question and then add instructions to new users on how to accept their answer, either in the answer itself or in a comment. While I don't think this is malicious in any way, I do think it sends the wrong message to new users and pressures them to accept answers too quickly. On one hand, I think that such instructions have no place in an answer, but on the other it does give a clue to future readers that the acceptance of the answer may not have been too well-considered.
I have seen this from more than one user, so this is just the most recent example and I'm not trying to call-out anyone in particular: Have you ever been to London? Have you ever gone to London?
So, what is the appropriate response? Should I ignore it? Edit the instructions out of the answers but ignore the comments? By the time I manage to post a link to Not so fast! (When should I accept my answer?) the newer user has already accepted the answer that they've been encouraged to.
I'm not sure why it bugs me so much. I realize that the person asking the question is capable of making their own decisions and that other than a small reputation boost for the answerer, accepting a question isn't that big of a deal in the overall scheme of things. I think maybe it's because the guidance is not only counter to the consensus (wait a bit to see all the answers before accepting) but that it's also self-serving.