There are ways around it I suppose. Like the time Sindy got tail gated by a SNAC, when I posted the message dump I wrote that it tore open the back of his Barghest like a tin can and left him drifting in space with no engine power, until I was able to shake of the mercenaries from my tail and tow him back to Alcatraz.
However, the bounty boards request either confirmation of kills or confirmation of ship destruction, and there's no way around that.
"Oh I shot him up, crippled his ship and he got away."
"Oh well, here's 1 million credits anyway."
Unfortunately it doesn't work. Except in cases of bounty collection, I fully support you here, though.