As a less dramatic version of this, just go through and purge your friends list. Also aggressively block / hide / unfollow any "shared" things you come across.

As a less dramatic version of this, just go through and purge your friends list. Also aggressively block / hide / unfollow any "shared" things you come across. For example, on Facebook you can hide something dumb someone shares, and then as part of that process, there is an option to "Hide everything shared from this page". If you spend a half hour going through and doing that, suddenly your feed is much less spammy.