Bare,
I don't know why gas stations are targets for so much crime, but there are a few places that I won't go to in the evening. Most notably among them are gas stations in certain parts of Birmingham, on the West side. The streets are bad, very bad, pot holes that aren't even relocated, they just keep growing. The intersections are scary because even with signals and stop signs, no one obeys them, they just drive right through, there are no cops, they don't go there either. The gas stations have folks that could easily be described as bad guys standing around outside and sometimes inside too. The cashier windows have bullet proof glass (like bank teller windows in Los Angeles), and heavy metal grates on all of the doors and windows. The outsides of the gas stations are awful too.
All of the businesses in that area are similar, old barely maintained brick buildings that have been painted white over and over and over, with bars on the windows, and the only safe(ish) parking is directly in front of the door. All of the strip malls are abandonned except for one or two run down stores, also with bars on the doors and windows, and you can see why because all of the empty store fronts have their windows broken out of them. To the best of my recollection, there are no major chain grocery stores there, there are places in strip malls where there used to be grocery stores, but they all ran for their lives ages ago.
I rarely even use the freeway to go towards the MS state line from I-65. I generally go through the national forest on 278 and 69 to go around the long way and avoid the West side of Birmingham completely. Center Point is as far South and West as I'll go in and around Birminingham. From there I go North and East, or I get on the freeway to go further South and don't get off the freeway until I'm on the other side of Jefferson County.
There isn't much that scares me, I grew up and lived in gang territory in both the San Fernando Valley, and in the City, in Los Angeles. My best friends in high school and I used to go to Hollywood Blvd at night and walk up and down the street, we crossed the street when we got to The Golden Cup, Jeffrey (he's very tall, and has a striking resemblance to Tim Curry, even now at 65) was always afraid he was going to get kidnapped, or worse. Large portions of Birmingham scare me right to my core.