Does the starter of a thread have the ability to delete messages in that thread?

I've noticed that several of my posts have been deleted without notice. I would like to know by whom, and why.

If I've broken a rule, I would like to know so I don't continue to do it. If there is some other reason, I think notice would be nice when one's message is deleted. If posts are deleted without cause or notice - why post?

Thank you,

Rayak

 

Thanks for your reply! It's a mystery, then.