That dive they do is most likely a "my territory, leave. Please." That the bees are communicating. Being there makes them feel like you are in their space. If you want to avoid it, just stay a little bit away from the area. There is, or was, a carpenter bee at my bus stop. It was changed to the other side of the street when the bus change happened, so the bee doesn't bother me anymore. But when it claimed that little area, it would smack it's face into my hair as it's way of telling me it wanted me to leave. It stopped doing that after I swatted it away quickly and moved over a few feet or so. It's not a bad thing those bees are doing. They just don't really have any other way to ask nicely for you to leave the spot.
That dive they do is most likely a "my territory, leave. Please." That the bees are communicating. Being there makes them feel like you are in their space. If you want to avoid it, just stay a little bit away from the area. There is, or was, a carpenter bee at my bus stop. It was changed to the other side of the street when the bus change happened, so the bee doesn't bother me anymore. But when it claimed that little area, it would smack it's face into my hair as it's way of telling me it wanted me to leave. It stopped doing that after I swatted it away quickly and moved over a few feet or so. It's not a bad thing those bees are doing. They just don't really have any other way to ask nicely for you to leave the spot.