If you have the appropriate permissions, you can ignore shared items from other users. Once you ignore a user, all items and invites belonging to them are hidden from the following:
If you have ignored a user's shared items, you can restore the items at any time, allowing you to view all items shared with you by the previously ignored user.
Note Once you ignore items from a user, all items, including ones you subscribed to, are no longer visible to you.
Links:
[1] http://staging.docs.d2l/en/taxonomy/term/3