The following behavior isn’t allowed on Facebook:

  • Posting things that don’t follow the Facebook Community Standards (ex: threats, hate speech, graphic violence).
  • Using Facebook to bully, impersonate or harass anyone.
  • Abusing Facebook features (ex: sending friend requests to many people

you don’t know). Overusing features could make other people feel uncomfortable or unsafe. As a result, Facebook has limits in place to limit the rate at which you can use features. Learn more about these limits.
To learn more about Facebook policies, please review the Facebook Community Standards.

Source: https://www.facebook.com/help/216782648341460?helpref=uf_permalink