I stopped preaching PC security to my family members every time I visit them and instead started enjoying occasional "told you so" moment accompanied with triumphal smirk.I also set my Mom up with SUA on her laptop with a PIN to login
Family don't let other family compute with admin rights
Imo if you need to write admin password while SUA then you are using it wrong. All admin related work should be done with an admin account when needed. More experienced members here can explain it better why that's the case.SUA all the way here; I don't mind writing the password as many times as it takes when I'm doing something that requires administrator privileges.