Which is all well and good (and don't get me wrong, it's certainly an intriguing approach) until you realise you've gone so far in stopping its abusability it no longer works as a mechanic
100 Elite CMDRs for a 10 mill bounty? Realistically, how many bounties are actually gonna be dropped on that offender, and how many are really gonna be from Elite CMDRs that can actually put that amount of bounty on? A few in a good day's work ganking? When you're talking a few hundred k instead of 10 mill, you've basically just gone full circle on making money in PvP BHing redundant. I can make that in ten minute's work at a RES or in less time transferring data between two stations.
Again don't get me wrong...it's actually a very nice approach conceptually; multiple victims required to bolster the reward. In practice though I strongly suspect the financial side of it would be instantly irrelevant.
Like said, the numbers need work, but the concept is there.
With almost any numbers it's still fairly ineffective to farm, and incredibly costly to the wanted ship, more so if you raise the figures.
There is no maximum cap on a bounty a CMDR can have either, so using my original figures, if a CMDR has somehow gains 100,000,000cr bounty, a wing of 4 Elote Hunters can claim 40,000,000cr of that between them. And cost the criminal 100,000,000cr on top of their rebuy.
That also leaves 60,000,000cr left for others to claim.
If you look at it as an financial incentive, rather than a full on bounty hunting career, it kinda works. You also get the satisfaction of knowing you cost the criminal quite alot. Lol
And again you can only place a bounty on a target that has illegally attacked or killed you. So you can't run around placing bounties on random strangers you pass in supercruise. Lol
You could go as far as having different limits based on the crime against you.
Assault could be capped rather low (10-100k), but murder capped higher (50-500k).
Or something.