When people can shut others down simply because they become drama queens over something they find disagreeable, that's when the real problem happens. It shouldn't, but thanks to political correctness, that's how things have been rolling the past 20 years or so, and it keeps getting worse.
It is only a problem when the law is used to silence people, and that has happened very rarely, and virtually never due to political correctness. If Joe doesn't like what Sally has to say and claims that her beliefs are offensive and ill-informed, he has every right to share his opinion and invite others to join him in ignoring what she says. This is basically what happens with "political correctness" - public figures that say stupid and/or offensive things (exercising their freedom of speech) often get criticized by their detractors (who are likewise exercising freedom of speech). You can complain that their detractors have too much influence, but that isn't due to any laws (except maybe those that protect offensive speech in the first place).
Perhaps you are not from the US, but here, people can be legally fired for a belief or statement that is currently politically incorrect. Religious symbols get taken down (by law) because a group of atheists are offended and can't stand to see such a thing (I'm not religious, and I don't care either way), a football team must legally change their name, etc...
It may not affect laws directly so much, but it definitely affects and controls people's lives.
They think maple syrup grows on trees!
No they don't. It grows IN trees not on them; that's why you need to install a tap.
This is a whoosh, but even more of a whoosh to whomever modded it informative.
He who has but four and spends five has no need for a wallet.