Are bumble bee the baddest bee?

Answer 1

It's not clear what "baddest" is supposed to mean here. Bumble bees are a group of related species in the genus Bombus. None of the species in this genus are particularly aggressive towards humans, though they can and will sting if disturbed or if their nest is threatened. Unlike honeybees, their sting is not barbed, so an individual bee can sting multiple times.

For the most part, though, they leave humans alone as long as the humans leave them alone.

Actually, the Killer Bee is the worst bee ever because their stingers never fall off, they are really aggressive, and they literally are willing to sting you to death, because if they sting you enough, which is about 100 times, you can die.