Ok to lawfuls:
At least word before engagement is must have. You cant just rush in and PEW PEW bad rogue. You taunt him, or offer him to pay fine for piracy or face trial.. Whatever is getting job done. You can still win fight just as easy with or without that message you send.
I mean, look at (Gaia) players, we shout poems before and in fight. Every normal player group sends few messages before engagements. You dont loose anything with it... Ok, maybe you give 5 secs of life to enemy. Thats it
Because if you drop out of lane with guns blazing, that is PVP whoring, and it is example of extremely bad roleplay. Do not do it.
To unlawfuls:
Since you are seen as scum in most "civilized" systems, police and navy came to conclusion that you are to be shoot at sight. I know that is wrong, but you have to adjust to it, and at least try to drag them in role play. Taunt them, try to make them see your side of things, and so on.
//not intended as flame. Try to act on it, its only way to solve this problem.