Best tip i can give is; get a Junker ID'd and tagged Salvager, and slap a CAU 8 on it...
Most of the time, some nice words and a polite tone will leave you with a "Damn, thats a sturdy ship. I hope you dont crash anything with that thing" and then your off..
Also Cam has some valid points, but NEVER EVER say anything that may even remotely sound like "just kill me"... It will mark you as a prime target for all pirates, and you will be subject to alot of oorp prejudice due to that.