Dear Hull C hijackers, why?

Hi fellow citizens.

I've ran into an issue the last few days. Some good citizens try to "sneak" into my Hull C anytime I try to load/unload it at stations. I have no issues with piracy, we will answer with shotguns and Polaris, that's not the point but :

1) That's contracted materials 2) When the "sneaking" people enter the loading zone, it will stop the loading/unloading until they leave.

So my question is, except preventing us completing the contract, what do you gain from that?

Thanks for your insight, I'm quite in the dark here.