Printer Sharing is off
Printer sharing is not problematic, as long as you disable it after you're done sharing it with your friend or coworker.
Time to fix
How to disable Printer Sharing
- Open System Preferences, go to General, then click Sharing.
- In the list, uncheck Printer Sharing.
How to disable on Monterey and older
- Open System Preferences, click Sharing.
- Click the lock icon in the bottom-left, then enter the account password.
- In the list on the left, uncheck Printer Sharing.