The whole concept of "abuse control" is specious at best. Anything brought in to either prevent forced PvP or prevent people switching at will only plays in to the hands of the opposing group.
Example (assuming open only play);
Trader A gets bored with trading and mining, swaps to a combat ship and goes to LTT 15449 (randomly picked for example), docks, does a final check before looking to engage.
PvPer B mulling around LTT 15449 sees a new ship undock at the local station with a PvP flag on, thinks Bingo! - Trader A sucks at PvP, couldn't hit the side of the station let alone PvPer B.
Trader A gets annoyed with how bad they suck, thinks that's enough, half a dozen deaths, cash running low - back to trading to get the reserves back up. PvPer B had a great time showing Trader A who is boss.
So Trader treis to leave the area and go back to traiding, but PvPer B is not finished and wants more kills..... oh dear, PvPer B has a wake scanner, Trader A cannot get away and keeps spawning at LTT 15449
Even when asked PvP B won't let Trader A leave, so trader goes to turn the PvP flag off... opps, cannot change flag status for 6 hours.... Trader A has no choice to but to log out and not play any more and due to the actions will never again turn the PvP flag back on.
1 less target for PvPer B from now on and all other PvP players lost out as well.
Okay, your point as valid parts but, here we go.
Trade A happens to be a natural at space combat, and it quite good. They have been trading safely for awhile now, and able to afford their combat ship. It turns (arbitary) to be a class A combat ship with keyboardfacesmashes anything it fires at.
PVPer B happens to okay at space combat as well, has been doing it this entire time. However as such, he has encountered significant losses as well, ammo expenses, repairs, other players not being easy targets and kill him instead, or just being killed.
They work hard, have taken their lumps and given as well as they have gotten. They happen to have a good rank, but are only flying a class C ship.
Trader A launchers and sees PVPer B leaving the station. Trader A decides he has spent a lot of money on his upgrades and it's time to test them out.
Trader A interdicts PVPer B. Although PVPer B is a bit better of a pilot, it didn't matter, the first two shots from Trader A killed him before he could even manuver.
PVPer B has a friend who happens to be in a Class A ship, Pvper C. PVPer C comes to get revenge. Trader A docks and switches back to solo mode or turns off the pvp flag.
The concept of abuse control is that you get to make a decision to engage in pvp combat, but at your own risk. It's fair, you make a choice, you may have won, you may have lost.
Everyone is under the same rules, and no one can hide perfectly safe until they're more powerful than you and selectively, cherry picking their times of engagement.
I realize there is no real perfect solution, but I know if this happens to me a few times, this game will also lose a player in those scenarios. I'm not here to be exploited, and I don't want other people to be exploited, I just think that people who want to play a certain way should have to accept the consequences.