Bangkok isn't very bad, but you should avoid some certain areas/districts. I can honestly say I have never ever seen so many guns, as in Thailand. Yes I'm not from US so I'm not used to guns. I've seen a gang member being executed in front of my face in Thailand aswell. If they mug you they won't be gentle under any circumstances, because most are buddhist it's not a big deal if you die. I'm not trying to scare you, but you should be aware. And do under no circumstances start a fight, be rude or make them loose their face, cause that means vendetta. The while family will hunt you down. Just smile, laugh and wave and you'll be fine. But you are a smart girl with common sense, so don't worry.