Call your local PD, they usually have a list of beekeepers willing to pick up swarms. A pineapple size swarm is pretty small and is probably a secondary swarm with a virgin queen. It is early in the year so someone may take them and build them up during the summer. Pretty much every veggie you get now a days is dependant on bees for pollination so consider that before killing them. If left alone they will very probably move out on their own accord in the next 24 hours.