Since when counter-pirating you're spending a lot of time in supercruise, I wondered what exactly causes hull integrity damage in supercruise. So I bought a sidewinder and tested it
First, I just left the station and immediately put throttle to zero.
Cruising for 30 minutes in supercruise in front of the station (minus a few interdictions...)
Did not hurt my integrity.
Then I undocked again, but this time I did not stop. Full throttle forward for 15 minutes.
Back home after another 10 minutes, 25 minutes of supercruise with full throttle caused this much integrity damage
So conclusion: Just being in supercruise doesn't damage your ship. It's the distance travelled. So you can sit in a piracy hot zone at 30km/s perfectly fine for a long time, it won't hurt your integrity.
First, I just left the station and immediately put throttle to zero.
Cruising for 30 minutes in supercruise in front of the station (minus a few interdictions...)

Then I undocked again, but this time I did not stop. Full throttle forward for 15 minutes.

