Tags?

I wonder if Glow should have certain tags people can add to things. For example, Reddit has the [serious] tag. I've seen a lot of rants on Glow, so I'm wondering if something like a [rant] tag would be appropriate. It might encourage people to take rants 'less seriously' (as they're often typed in a fit of frustration and so can be rather hurtful, embarrassing, or not well thought out).