I can see the point you're getting at, but flying a trade ship with a certain tag and ID, and only landing on the bases where that tag/ID "should" be landing... That's not RP. It's part of RP, staying in character for the faction and all, but it's not RP. It's playing an NPC, silently flying between certain bases with certain cargo. People can't be forced to RP, and no restrictions or encouragement for traders to act one way or another will make those traders RP. Traders who want to RP already do so, and those who don't, won't.