The Get To Work question you're all tired of answering.

Without mods, the best way to avoid aliens are don't go to Sixam (Alien homeworld), don't get into the Science Career (it is my favorite career), and stay away from Alien Night at the bar. If you don't want to bother with MCCC there is a mod that disables Alien Night at the bar. Here is a link to it. https://www.deichschafblog.de/s4/mods-fuer-zeit-fuer-freunde/ Go down to the one that says less bar nights