Sounds like my part of Porter County. There are few nice days where you can't hear gun fire.I suspect you're correct, to a point: no DIRECT affect on the gangs. However, if and when more people legally carry, and with a few more perpetrator ventilations, such as this one, behavior gets modified. However, it is a slow process.
In my little corner of Morgan County, a halfway nice weekend afternoon sounds like you are just outside a shooting range. I suspect because it is well-know that most homeowners in this area are armed, we have a relatively low burglary rate.
On the other hand, maybe knowing the victims are more likely to be armed will increase the risk-taking and aggressiveness of the gang-bangers' attacks.
I just fear for the kind of difficulty the victim in this case will suffer, because, Chicago.
The biggest issue I see with the gangs is they have no respect for life, their's or anyone else's. That is the majority of their murder(shooting) problem.
Hopefully more people carrying will help with the everyday muggings, carjackings and such.