Spoiler blocker

This phrase is used to block potential spoilers in the YouTube mobile app comments. As the first comment is automatically displayed, writing "Spoiler blocker" makes people like that comment and ultimately makes "Spoiler blocker" the first and top comment to be displayed and hence preventing potential spoilers in videos.

*Opens YouTube app*
*Sees a Jarno Opmeer PSGL video*
*Unintentionally looks at the comments*
*Video doesn't gets spoiled as the first comment is Spoiler blocker*