Because they live in small nests bumble bees never swarm. Bumble bees do not produce enough honey for commercial use, just a few grams at a time to feed their young. Not all bumble bees have a sting. Drones have no sting at all.
Bumble bees are much less aggressive than honey bees. Generally they will not attack a human at all, unless their life is under threat. Don't wave your arms wildly in their presence, stand quietly and once they smell you are not a flower with pollen they will move gently away.
Bumble bees do not lose their sting and die if they use it, as a honey bee will.
