other purpose, make lower the empathy for guard/non-guard (expect zoners maybe) and/or start with a lower rep (more its red, more we love it:)).
now why ?
Every one who pay a bribe to a faction is not anymore hostile to the guard faction. Starting with lower rep or lower the impact on the guards will solve it a little.
and why except zoners ?
cause i've never seen any zoner mission and the bribes are the only way for the zoner guard rep:D