I have an agreement with all my insect predators. If they aren't bothering me, I let them live and do their thing. When we lived in Idaho we had hornets living in the space between a roof and the eaves of a breezeway between the house and a utility room. There was always a sentry hanging out by their entrance, which was close to where I had my tandem bike hanging. We came and went by the nearby kitchen door. Put up the bike and took it down. Never had a problem. Neighborhood kids came into the carport one day to try and take the tandem down. The kids had managed to get one wheel down, but left the bike hanging by the other wheel. According to one who 'fessed up later, the hornets came out in force and chased them off.
I suspect one tried to swat the sentry, not that the hornets were protective of my bike.