How to delete a thread

[t.t.s.t.a.r]

I would like to delete several threads as I accidentally submitted the same one 6 times because I thought it wasn't working, how do I delete them?

 

[zeio]

AFAIK, you can delete a post but not a thread. Try the "Report Post" function and the mods should take care of that. It's that exclamation mark button near the bottom left side of every post.