Okay... how many times have you wanted to represent information like this...So you write:-You're not an idiot, you know your BBCode, that should work... right? Not on VBullitin. 
I want it all the time, and I know others who have decided to post guides and tutorials elsewhere because they couldn't get that level of formatting on RZ.
I can find at least one plug-in that will allow it to work though!
BB Code [table] - vBulletin.org Forum
If this, or alternatives conflict with other plug-ins RZ runs, the Mobile ability or presents a possible "exploit" I won't push. But if it can be done, it would make things a lot easier to write in a far more presentable manner.
Currently I'm looking at going "oldskool" and writing .NFO / .DIZ style tables in [pre] or [code] tags.
Code:
╔═══════╤═══════╗
║ Item1 │ Item2 ║
╟───────┼───────╢
║ Item3 │ Item4 ║
╚═══════╧═══════╝
It's not as presentable at all, I'm sure you'll agree.
Additionally, it's a space eater in the database.
Making the table in something else, turning it into a .png (as I did at the top) and uploading to a whitelist host works, but you can't copy and paste from that. We can't embed flash (for obvious reasons) and none of the whielisted image hosting sites (or any other that I know of) supports .svg images (which you may be able to copy and paste from, but your browser may not even show if you're still using IE 6 or so) so I have no good solution... just nasty workarounds.