Particularly obnoxious dark pattern: Youtube premium subscribers- using a google browser to search google- get results with embedded videos (e.g., reddit), which force you to watch ads you paid them to avoid.
Blatant conflict of interest, probably far down on the list when it comes to google tho.

Getting ready to play Scrabble with my 91 yr old mom.
Mom (jokingly): I'm saying a prayer for myself.. but I'll say one for you too

Me: You gave me life. You answered the ultimate prayer and rescued me from nothingness

Mom: Yeah, I already had two redheads and I was praying for a brunette
🫠