I've had the experience about five times recently when after I answer a question, the asker ends up nagging me with more questions in the comments. The most recently was just now: Exercise $14$, section $2.C$ - Linear Algebra Done Right. I suspect that the person asking the question has not really made enough effort.
I can't be the only person who has experienced this.
What is the appropriate response to nagging questions like this? I usually tell them to ask another sitewide question as you can see above, but it's irritating enough to me when these endless followup questions start that several times I have considered just deleting the answer.
After I posted this question, the questioner deleted the bulk of their comments, so I'd like to summarise the deleted discussion.
The questioner used a dubious method of proof, so I'd suggested using a different method to solve the problem, based on induction.
The questioner was not familiar with induction, and trying to explain mathematical induction to someone from scratch in the comments seemed a rather exhausting thing to do, so I suggested they ask another question about it.
Then it got very annoying. The questioner started posting "solutions" consisting of some equations and some phrases from the Wikipedia article on mathematical induction or a similar text, in a "monkey-see-monkey-do" fashion, very clearly not understanding the principle at work, and then asking me if they'd got it right, repeatedly.
I don't want to offend this poster nor do I want to hurt their feelings, but at some point it's necessary to put the brakes on, and there doesn't seem to be any mechanism to stop people from doing this kind of pestering behaviour beyond telling the person to get lost or ignoring them.
This is not the first time I've had this experience where the questioner asks a series of exhausting and silly questions in the comments under an answer.]