Your very clever, you built a robot that makes tea. You want to share your brilliant new robot with everyone. Everyone likes tea right? So you make it a nice mobile base and give it some arms and set it off around your town.

At every house it stops and knocks on the door. If someone answers it asks "would you like a cup of tea?"

"No thank you" They say and slam the door.

Three hours later the bot comes back, it's been round all the houses and has started again.

"NO THANK YOU" The person who lives there yells, "I don't drink tea, I'm allergic to it" you didn't think of this possibility. The bot doesn't know how to handle it so it ignore it and carries on.

Three hours later it comes back.

The person is now pissed off and calls the cops. It's operating on a public street they say there is nothing they can do about it.

Three hours later it comes back again.

This time the person follows it. All the way around it's loop. Eventually it stops back at your house to restock on water and tea bags.

They knock on your door. "Will you fucking stop your damp bot it's really annoying"
"Oh, but every one likes tea"
"I don't, I'm allergic to it."
"Huh, really?"
"Yes really, and fuck you for that tone. If it knocks on my door again I'm going to smash it."
"That would be destruction of property, I'll call the cops"
"Look just add my house to a list or something so it leaves me alone."
"It doesn't have the memory for every house in the world , I can give you a sticker to put on your front door, it'll ignore it then"

Next week someone else makes a bot that makes coffee and we start this entire cycle again.