I know there has been multiple threads on this but I think our best option If we were to stick to one would be.
Delete Treads- There Should be a button somewhere on your thread where you can request a deletion of thread.
Ex. Press button, it gets sent to all mods kind of like a cult wide message but only to the mods for a deletion.
Editing Threads- There should be some type of edit and I think the best option would be to add on to your pre existing thread. This would be very helpful for BST, Ski gabber,Etc.
Ex. Make a BST thread, Something sells add at the top "SOLD-Jiberish Ignant"
This I find would be the best route in making this work.