Ok, three of those four cases were Jillian breaking the truce of Parley, not the RCCII collectively. All this proves is that you can't trust her, specifically.
Besides, even if Jetstone had a reputation for breaking parley, it isn't exactly like GK had a choice in the matter. That parley was a demand for surrender; a refusal to parley without a contract is tantamount to a refusal to accept said offer.
Basically, what I'm trying to say is that people are smarter than you think. Even if tricks like you mentioned are possible, nobody competent is going to fall for it.





