I'm interested in what some people have come up with for rules for warbands where you try to make the worst warband possible. You'd then swap warbands with your opponent to see what kind of warband is the "worst".

Here's some ideas our group came up with.

Must have a Commander
Can't include Requires Commander pieces
Must be 199 or 200 points
Must have at least 8 activations

Anything else to watch for?

This is known as reverse constructed.  There are some rules here... we've been playing these types of fun game in the SF Bay Area for a few years...

http://www.jugenstil.com/derry/dnd/ddm/