Factions and how to prevent abuse

[Davin]

But who would want to trust a low-level clan to know about the siege in advance?  Wouldn't they just ask for scouting of the area "for no particular reason" or because of some undefined reports that have nothing to do with the city?

Once a clan gets to be of higher level in their faction, wouldn't they prefer to benefit that faction and not make use of any privileged information in their other factions?

Pardon me if I'm asking stupid questions, but I'm trying to work off logic here rather than historical evidence.