Just my two cents: Have the bounties fit a set of criteria
1- No house lawfuls around.
It happens fairly often, especily in off peak hours of the server, pirates invade a system (new york being a particulary popular target) and proceed to generaly 'take over' until they go offline, or until lawfuls come online in force.
Solution: Allow screencaps of the comm menu in system sort mode showing the system is over run to allow a blanket 'providing order' type bounty, essently the hunters focus on taking out the lolpiraet's infesting a system and making it mostly safe. This also requires a bit of coordination on the hunters part. For collection, prehaps require death messages or other proof of disengagement for at least 50% of the unlawful presence (unless they have a few batleships around, in which case handle it on a case by case basis on how they do what they can to assist)
2- lawfuls arround (offical faction, or known and authorized indies, for example Gafwmn in Liberty)
Say theres just a pair of LPI Libbys on, but a few lolboats, supported by bombers and fighters, they can activate a blanket bounty for assistance. The hunters will then assist the lawfuls and dive the unlawfuls out and generaly assist the lawfuls.
The bonus to both of these is they would require multiple people, thus more role play.
Restrict them to specific hunter factions (at least the no lawfuls one) and you also get it setup with minimal chance for abuse within the rules of the agreement.