Maybe I do you wrong Sindroms, because I dont remember who exactly you are ingame, but I think those pirate GBs are following your/the LR example.
For months, you had rogue GBs terrorising Liberty and traders. THat wasnt pirating, that was an army of terrorists shooting down lawfuls. One incident I heard about was 4 LR GBs + some bombers stopping a trader who had 0 money, 0 cargo, 0 guns, and only a sanction notice in his hold. Rogues blew him up after a 'hostage situation' had allowed them to attract a massive LN fleet for a nice big fight.
Dunno if you are part of it, but thats what happens pretty much every time you see a LR somehwere. Always GBs, never alone.
Now, for the defense of the indy pirate GB (which Im not a part of). They are wrong to form unbeatable fleets, but:
Only ship I pirate on is a lonley sabre with CD. I regularly have to blow up traders although I dont want to, because they never take me seriously. Have to blow them up like 70% of the time because they think they can run.
And... you can start a massive lawful/unlawful battle in NY without wanting it... I did once. 2 LSF try to arrest me while Im pirating, but cant pvp for sh*t. I kill one, the other keeps running on thruster to hide near Missouri. I can understand that... if he fled he couldnt help uphold the law for the next 4 hours. I cant disengage because htat would mean I cant re-enter NY for 4 hours... its a stalemate. So I keep trying, more and more LPI/LSF come in, when its 4 lawfuls including cap ships, a whole damn fleet of pirates (one LH dreadnought... first time I saw one) comes to 'help' without me wanting it.
Rules that may fix these things from happening: no enemy ships bigger than GBs in 'capital systems' like NY, London, Tokyo except for announced evetns or oorp permission from lawfuls. You can write that rule into the ap ship description so everyone knws about it.
And: possibly a rule that allows lawful characters of official factions like LN and LPI to respawn on another lawful charcter in their 'capital' systems after they die, so rule of law doesnt completely break down.