While you can't block users from watching your content, you can block them from commenting on your channel: https://goo.gl/vWj3nT . Also, you can flag the comments as spam. Here's how: https://goo.gl/aBTr7w
Hey @TeamYouTube why is someone allowed to come
and abuse me on my own channel with threatening actions
and no reply button. My channel I criticize and review channels promoting fake news in the UFO field..google should be backing me more and promote the truth on their recommendspic.twitter.com/4FGGPWXQYj
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