[ScipioAfricanus]

Ok so some random person is saying something you find offensive or hurtful. You can block them so you don't have to see what they post.

It's a decentralized solution to a decentralized problem.

[oblio]

Not everyone finds the blocking option in time.

Not everyone has the self control to avoid the comments in the first place.

Not everything you've seen can be erased and forgotten (there's a reason NSFL exists).

[DanBC]

You don't seem to have any clue about how prolific trolls can be, and how persistant their threats are.

[s73v3r_]

I would encourage you to look up the GamerGate scandal from a few years ago, and update your knowledge on the topic of online trolling/harassment.