Basically, this could work a few ways.
1) Once weekly, two DiVAS will be randomly selected to compete. They will be given a target and a scenario, and will be given one week to write out a plan of attack. The community will vote on the plans, and whomever wins will remain a DiVA while the loser is kicked out of the community and will have to challenge another member to regain accepted status. Alternately, the winner could gain points for some sort of DiVAS ranking system,
2) DiVAS applicants will be required to challenge an existing member, as above, to gain membership.
3) Existing members could challenge other existing members at any time, and the winner would receive rank points.
While I wouldn't want to be a mod, I do volunteer to handle writing the scenarios if you guys like my suggestion.
Let me know what you think.
*EDIT* Everyone seems to concur that eliminating people from membership would be too extreme considering the number of members we have... So it would probibly be best to go with a point system. The best way I can think of to do this would be to simply attach a payment and renown value to each contract, and rank the DiVAS members by net worth and notoriousness.