Why can’t i comment on anything on Facebook

You may have had good intentions or may have not known about Facebook policies on acceptable behavior, and this block can be frustrating (it really is). To help keep Facebook open and welcoming, they try to prevent people from unintentionally misusing Facebook, even if you felt that what you did was acceptable.

You may be blocked from doing something on Facebook when:

• Something you posted or shared seems suspicious or abusive to their security systems. This can last up to a few days.
• Messages or friend requests you sent were marked unwelcome. This can last up to a few days.
• You've done something that doesn't follow Facebook Community Standards. This can last up to 30 days

To avoid blocks like this in the future, you can:

• Review Facebook Community Standards to understand what kind of sharing is allowed on Facebook.
• Only message people you already know.
• Only send friend requests to people you know.

Best of luck!