Honestly, I think there are many ways the internet is changing our society. I read a study showing who in our society is most concerned with politically correct speech, and it's actually inline with who needs to be most concerned with it.
Those most affected by the necessities and dictates of politically correct speech are journalists, professors, advertisers, those who deal with a greater public than most of our comparatively insulated lives, and those whose jobs are affected by the greater public.
For example: If your an advertiser you don't want to offend a segment of society as your goal is to make a product desirable to anyone with cash, so your going to concern yourself heavily with speech and what might offend.
We live in a small, rural, largely white town. The concerns of speech, even at a place of employment here aren't the same as the concerns of someone teaching University in New York, or someone with an internationally popular cooking show or a journalist. And that is similar for the majority of Americans even in far larger towns, because people are often insulated from those outside their own people-group.
Those whose speech is heard by millions or by a diverse group of impressionable people on the other hand, have a need to pay attention to every word out of their mouths.
In other words, most people never even considered what they say because they never needed to.
Then the internet happened, and overnight every person on the planet has an audience, every word is seen by all and not just our insulated groups of yesterday and it's overwhelming because overnight you have to learn an entirely different manner of speaking, or risk offending everyone by months end.
I think most people decided it's too much, and took on the schoolyard teaching "sticks and stones may break my bones but words will never hurt me".
I do think even in this ever changing world of pc speech we should take care with our speech because we all have a diverse and global audience similar to the journalist today, but in the end I dont believe it should ever bleed into or affect political speech.
For example: If I want to share a concern over illegal immigration I ought to be able to do that without dealing with people who can't manage an understanding of the definition of illegal alien or without an accusation of racism because I mentioned we have a process for legal immigration that should be followed. These things are matters of national policy and using inaccurate accusations of "offensive speech" or accusations of racism to silence your political opponents is far more wrong than any offense that might be had due to the conversation topic naturally.
So, it's rather a strange topic. On the one hand we
should have more concern when online with our normal speech, but in the same breath that concern cannot be used to silence appropriate political speech of national concern.