Currently the OP is able to delete the thread, which some have done when things do not go their way.
I am not sure how this would go over as the person starting the thread would be able to delete posts from those "they" did not like regardless of content or relevance.
Or making their thread a sticky or locking the thread when things do not go their way.
I have, in the past, un-deleted threads because, while the OP, was no longer happy others had put in "valuable" insight.
To be honest, everyone here already has the option of contacting a moderator and report posts. Unfortunately, very few take advantage of doing so.
I see several potential issues as there is no way everyone will be happy. I can see someone complaining because the OP did something they did not like.
Look at this thread, started by one person who seems to think they are in the right and most others are wrong.
Enough is enough, but others could argue that the OP is guilty of the same thing.........just saying
Heck, here in the WC forum it seems like some people will complain and argue if you tell them the sun provides light.