Ignoring them , then getting out of there is probably the best solution. If you talk to them it will only antagonize the situation. Showing all a possible attempts to disengage from the BG's before having to shoot shows you tried all other choices before having to defend with a gun.
Calling PD along the way is another good option. Sticking around in a known bad area may be the worst solution, who knows maybe the other car had pals waiting nearby to car jack your neighbor.