Just some data since latest patch:
4 interdictions:
3x master, 1x elite.
ships: dropship, FDL, FAS.
my ship: Anaconda.
my combat rank: harmless.
my trade rank: elite.
my cargo: limpets and 1t samararium.
no pp, no missions. Get to be in peace most of the time, the interdictions are now quite rare. Gotta wonder @ the combat rank of those pirates though. I m baffled as to the scaling being used by this game.
If I were a pirate I'd totally go after an Elite Trader with a Harmless combat rank!