frYes, the real world is as you said. While with internet you facilitate 1000x to get those "lunatics" together. So you are not going to be no more the lonely weird person that changes his mind thanks to face to face societal feedback. 

Here you create an echo chamber that increase your convictions and will surely create real implications.

I'm pro free speech but we need at least to acknowledge that anonymous/pseudonymous free speech makes good things better and bad things worse