What about doing what I've proposed one time in the past?
If you are killed in a snub, your character + any of your characters that can initiate the attack* cannot reenter the same system for 2 hours, except for your trading chars - because traders usually do not initiate the attack or piracy*. If your trader goes down, then you can't enter the system with any of your chars.
*Some traders can pirate other corporations. In such a scenario, the line would be unable to fulfill in the system they died in as a snub.
This little bird went to sleep forever. So long.
Thank you for everything.