My L70 Shammy team is on Argent Dawn EU, a RP-PVE server, but I've been flagged since the mid-50s and didn't suffer a death until 2x70 Rogues jumped me at 69.

Anyway, working on my dailies and had a lot of PVP on the Isle of QD today and don't understand some of what happened, so am looking for advice.

I was in 'town' just outside the phase 1 hut and a blue warlock hit my main with SoC.
I turned and 1-shotted him down but was duly guard-whacked, whilst he had no guards on him or his corpse.
He was definitely in town, as he was in more towards the middle of the town, not away towards the woods.
How was this possible... I was attacked, responded, and ended up with 5 guard-whacked shammies

Later, 3 or 4 blue hordies (mixture of brave warlocks and warriors... ooh, so brave in their bright blue outfits) followed me to the Inn, where I was handing in, and attacked.
Having been attacked, I turned and responded and was guard-whacked again!
I take it you cannot retaliate in town at all?

Later, a pally started hitting on my main in town and I just healed whilst the guards whacked him.
Luckily healing is not 'aggressive' as far as the authorities are concerned

So can anyone explain PVP in/near towns... I want to avoid more repair bills x 5, please!