If this game at ncase [0] has taught me anything, it is that adversaries tend to exploit good intentions, more often than not. It is really difficult to navigate such waters, imo. I haven't figured out the panacea, but it is safe to assume that negotiation tactics must be in accordance with level of trust and situational context. Looking after one's own self-interest regardless tends be a nice rule of thumb.

[0] https://ncase.me/trust/