Greedy Pigeons

So anytime I step outside during daylight hours, these two pigeons (who have yet to be named) always fly down to meet me, looking for seed. I suppose it is my fault for feeding them in the first place, and I think I may have gotten them hooked on corn, but they are very persistant things. I sit on the step and put seed on the ground in front of me, then they come strolling over, pecking away at my feet. They come to visit when Dave comes outside too, but as soon as they see it's him, they turn around mid-flight and book it back to the roof of the Opera House. I think it's because Dave won't give them any corn. He's a bad man.