I guess every shared resource related to privacy and security get affected.
The online purchase except through Walmart and Amazon or handled by myself. The Walmart and Amazon purchases have fake credentials so deliveries are in a variation of a previous resident.
I don’t worry about apps on their devices, per say but the home Android TV box is kinda hacked.
All medical bills are mailed to a certain mail box.
Certain phone numbers are shared with limitations…
As far as tech, the number one compromises has to be password managers, KeePass and how we share those credentials. (Signal).
I make an effort on every PC to never ask to save passwords.