Get behind me, employee of Satan!!
I probably wouldn’t clap for a piece that I found morally offensive.
I’d probably bail the moment I recognized where it was going and neither clap nor comment.
But otherwise? If you read to the end and have a strong emotional (or bodily) response?
Give it a courtesy clap and move on.
And maybe post a comment like “This made me vomit. Where do I send the dry cleaning bill?”