Has anyone had best friend seekers burst into their house?

I'm starting to notice it more. I had 2 sims walk into my house without knocking. I know 1 sim who visited had a previous conversation over the phone with a household member. Then she comes to the house wanting to be best friends with a different household member that she never met. It's like following/meeting a friend of a friend on social media but the way the game has sims just walking in to ask that question is inappropriate.