When someone's bothering you, block them and you won't hear from them again! You can always unblock if you're feeling magnanimous at a later point.
Block by visiting the player's profile page, tapping the ellipses in the upper right corner, and then selecting block. This will prevent all their personal messages and posts from reaching you.
If you’ve blocked someone and would like to renew communications, visit their profile page and follow the same steps you use to block in order to unblock. Just tap the ellipses icon in the upper right.
Blocking is underutilized! It’s an easy way to cut off contact with anyone who may be irritating to you.