I’ve had to cave and use some services (for work reasons) that I’d swore I would never use. No matter how much we value privacy and look for alternative software/services when possible - we still have to eat and pay bills.
If you are in the same boat and you must use services like that, then my advice would be to keep it strictly business. Keep your personal details and personal social connections to a minimum unless where it would be otherwise beneficial for work purposes.
Grass is green, water is wet, the sky is blue, and privacy settings don’t do anything.