Fran, while your point may be valid, this site runs by its own rules. And this site’s definition of trolling includes

Trolling can include any post that includes text or pictures that are off-topic, NSFW or shock (including depictions of nudity, graphic sexuality, or graphic and realistic violence, gore or mutilation), spam (including text, emoticon, blank-line or empty-quote spam), name-calling, ad hominem insults, threats, harbumment or mini-modding.

So even if it’s poor trolling, it’s still — by this site’s definition — trolling, and as such is perfectly permitted on the side of the board I don’t go to because of this site’s rules about trolling.