Here's how you can get a free script that will hide annoying YouTube users.
1. Go to the script page.
2. Click the Install button.
Here's a list of features:
"This script removes youtube users you choose from appearing in:
-Recommended Channels tab
-My subscriptions/What to watch (if someone you are subscribed to likes/favorites a video from them) "
For more, see the original article at the link below.