Strangers in your conversation

This drives me crazy too. It's not just when you take yours sim out with a friend or household member. Even when you take a lone sim out, there is always some spawned sim, that has to track them down, to talk to them. I had my sims exploring in Selvadorada and they were constantly being targeted by other sims. All I wanted to do was explore with my sim, without constant interruption. Who knew there were that many sims hacking their way through the jungle. 

By all means have sims around the world, make it feel alive but stop having them constantly interrupting game play. 

Playing on PC. No mods. No CC. All packs, just a few kits missing.