Yup, bounty hunting is only partly about the kill. The stipulation that the target know who's behind the bounty is a fine move by those posting bounties.
In the case of an ongoing bounty, against say a faction, I think even once you've taken em down a few times at least a hello of some sorts is in order.
Some of the lines I've used and heard:
"Cha ching." (cash register sound - one of my favourites)
"Got your walllet ready" (courtesy Megiddo)
"Scofield, Synth Foods say hello" (mine, just before his buddies turned up and thrashed me)
"Look, guys - our retirement plan just entered the system."
*checks bounty list* *laughs* *powers weapons* "Hold on a minute there."
And I agree with Gronath, any bounty where I didnt let people know was no fun for anyone. Having said that if they just appear out of nowhere, it's best to keep it brief.
