Type out all the table code. Its quite lame. Maybe there's a shortcut I'm unaware of. But I think this is just one of the drawbacks of allowing certain html codes to exist for users to abuse.
I have to say though. I really hate it when someone starts a thread with tables. I like to use the preview pop-up thing (hold your mouse over a thread for a few seconds to get a snippet of the first post (or the whole actual post)) and when tables are used first thing, all you see is freaking HTML code instead of a post T_T
