That is heading into one of the worst neighborhoods in brooklyn. I get detailed to work in Rescue 2 every once and a while..the last time I went I was asking the guys about what it is like over there now. They said it is good until you hit Grand, after that it is like the old days...straight up ghetto. One of the busiest areas for fire duty in NYC, also is one of the highest crime and violent crime (ie: gun crime) rates in NYC. Not a place to be exploring on foot during the day, never mind at night. If you go west towards Court St you are MUCH better off, much more of a selection...MUCH more friendly of a neighborhood!!!!
I don't know where that post came from but Plan B is a run-of-the-mill sports bar squarely in Prospect Heights. You might be bored but you won't get shot. It's not even remotely one of the most dangerous areas in Brooklyn. If it is then I don't even know what you'd call Brownsville or East New York.
Yep I'd venture that Prospect Heights is one of the safest neighborhoods in Brooklyn right now. Plan B is in the midst of nothing overly spectacular, unless you count Ample Hills (fantastic, if expensive ice cream). Never been to Hot Bird but it's before Washington Street on Atlantic. That's pretty safe.
Past Grand can get a bit hairy at night but isn't that bad at all. Pre-Washington is just full of strollers and completely gentrified right now.