Swarms And Removals

Not typically. In fact, honey bees are much less defensive in this state than they are around their own hives. They have engorged themselves on honey while scouting for a new home, and are not looking to pick a fight. 

Spring is normally swarm season. The honey bee colony is rising in numbers and resources are bountiful, so things get congested fast. Although secondary swarms later in the season are normal, the Spring allows the "swarm" enough time to find a new home, build comb to store resources and space for the queen to lay eggs, in preparation for the coming winter.

Spraying the honey bees is discouraged, as it will obviously kill them. Also, if a beekeeper brings the affected honey bees to their apiary they are exposing their honey bees to whatever you sprayed them with.

Swarms that are in buildings or structures have already (or they are in the process of) making that their new home. Contact a professional beekeeper who is skilled in "cut-outs" and "trap-outs" to help remove the honey bees safely for them and you.

This is discouraged and causes major problems. For starters, if you seal the entrance you will entomb all of the bees, the comb, and their resources. This will cause all of that to rot behind your walls and attract rodents and other insects looking to feed off of the leftovers. In addition, most beekeepers don't want anything to do with removing dead bees.