Is the graying of comments meant to hide them, or simply to warn that they are inflammatory, incorrect, or otherwise not worth your time? I sometimes do read gr

Is the graying of comments meant to hide them, or simply to warn that they are inflammatory, incorrect, or otherwise not worth your time? I sometimes do read grayed comments but I rather like how it filters the whole comment so well while still allowing me to read it without uncollapsing it as on reddit.