It's only happened the one time. It was a real comedy of errors, too, as I had a scheduled pickup from UPS that day, and they won't actually ring the bell. I have them on the Ring camera running up to the porch, sticking the "sorry we missed you" label on the door and running back to the truck. I was determined to catch him before he could run away this time, so I ran to the door when FedEx man arrived. I was in such a hurry both dogs got by me and ran barking onto the porch, scaring the poor FedEx guy, all with me trying to hand him the return packages, him trying to give me the bike, both of us confused for maybe 30 seconds before figuring it out. (Fortunately, we have an external gate at the porch entrance, and FedEx guy retreated behind it.) With so much chaos, I'm sure he will always remember our house. Poor guy.

Epilog: After this incident, I got an inside gate so dogs can't get to the front door at all.