My suggestion is thus, with high enough rep, or at a certain status, maybe a pledge, asking a ganger what they need, won't trigger an automatic no. But instead would give you a list, "Yeah, I need this, this and maybe this, but not right now I got bizz." Or something like that.
Currently there are ways around this, but they involve side door RP that doesn't really make sense. "Let me escort you around so that you can talk to my bloods and I can listen in to know what they want, to go get and give that thing to you to give to them." It's circuitous and means that a lot of the time. When with the system I've proposed above, you get a more natural, survey turf, and then find someone, "Hey, here's the shit, go to STREET AND STREET, and give it to the banished bald chicka there. Tell him that Mad Gooser Gasoline sent you with that."