He is free to take any action he wishes in regards to vote buying.

I clearly stated in my first comment that he can go on buying votes, the issue was a specific bot. Since the market for upvote bots is relatively big and homogeneous, he doesn't lose with switching the bot.

But he has not said he is a contest writer. He is a poet.

Do you think I insulted him with that suggestion?

If you don't want him to take threats personally, perhaps you shouldn't threaten him.

He is free to take personal whatever he likes. From my perspective, it is not personal. In fact, I tried to be lenient by A) warning him beforehand and B) offering legitimate alternatives.