The mask of Internet Anonymity

I don't get people who say "it doesn't matter what you say on the Internet."

They use this as an excuse to be horrible, cyberbully and say things they'd never say in real life. They claim "It's not serious," "It's a joke," "It's not real," etc.

And they fail to realise that because of anonymity what they say matters more, as it shows their true colours.

If you want to see someone's true face give them a mask, isn't it?
And the Internet serves as the biggest and most opaque mask that one could ever choose.