If a member is bothering you, you can block them. Once blocked, they can no longer contact you by private message or interact with you.
To block someone, open their profile or one of their posts, tap the menu, then choose Block.
Blocking is discreet: the person isn't notified. You can combine it with a report if their behaviour breaks the charter.
You can unblock a person later from your account settings if you change your mind.