The theory I heard elsewhere on this board (I'm not about to search for it) is that Brannigan's Law was instituted because
of Zapp. Zapp must have interfered with an undeveloped species
Originally posted by...uh...I 'unno
probably by having sex with it
and DOOP passed legislation prohibiting this, nicknaming it Brannigan's Law. Zapp, being an idiot, though it was some kind of honor.
It's just like the fact that the Prime Directive (either the basic or Temporal version) in Star Trek was apparently created because Kirk screwed up so many alien worlds/timelines.