I would like to know how to close topics and replys and I think others would.
Only mods and the system can close topics
Well, there is always a trash button next to ur reply...if u want to delete it, press that.
Only leaders and above can close topics.
System, if there are too many flags, can also automatically close a topic.
But, like @LotsaApples said, you can press the three dots on a post, then the trash can, and your post will delete. You cannot delete multiple posts too quickly, or an error message will pop up saying you're deleting posts too quickly