[Ron61]

I think you have to have a moderator delete a thread as they had problems long ago with people starting a thread which started a fight and then they would delete the thread.

As for adding a poll you can edit the thread and at the top of the box there is a Thread Tools icon or link. Click on that and it drops down a small menu and at the bottom is Add A Poll to the post. But this only seems to work for the first post. When you get to the edit screen click the go advance button and it should give you an option to delete the message but this doesn't seem to work at times.