They can respond to some comment if they have too many, but to not respond to any... that's cold...
Comments are plenty if you engage. Upvoting yourself all over is "bad form". Posts are more limitd as they take more work, so ideally if the whole community was upvoting others for their content, we could do away with self-voting, but sadly so many are stuck in autovotes or selling votes that they don't upvote other people's content. I used to not selfvote posts, but I do now. Don't use bots. Upvote your own posts, not comments.