as others have posted, i send repeated Wing invites. if those are ignored, or best case, unnoticed by the offender, i Boost Ram into them a couple of times. if that doesn't work, well, i have the funds to cover a Bounty and/or a few rebuys.I like Open CGs, always have some interesting interactions.
While Bounty Hunting in Open during a CG, I will often run into another commander that will dive in at the last minute and steal the Bounty from a kill in progress.
You can send a wing invite, but they will often refuse and continue to snipe your loot.
My personal policy is to ram them to death (avoiding a criminal bounty and notoriety) , and most of the time they run off after taking hull damage.
How do you handle this situation?