If you’re familiar with social media (since you’re reading this, you probably are), then you understand that the audience are called “Followers” because 1) They follow your stream of thoughts, and 2) If you’re charismatic and influential enough, they might even follow you. Some people use that to promote their ideologies or their work and they do it well, others become a copy of everybody else in the process of filtering their thoughts, doing and saying things, and refraining from doing and saying other things so as to please or at the very least not piss off their “followers”.
According to Wikipedia, Political correctness is a term which denotes language, ideas, policies, and behavior seen as seeking to minimize social and institutional offense in occupational, gender, racial, cultural, sexual orientation, certain other religions, beliefs or ideologies, disability, and age-related contexts, and, as purported by the term, doing so to an excessive extent. In plain English, it means using words or behavior which will not offend any group of people.
In the world of social media, people will most likely judge you not on what you meant to say, but rather on how you say it and how they interpret it. I don’t speak for anybody but myself when I say that sometimes I fail to choose my words and expressions wisely and I end up giving a different impression than the one I was aiming for. When I finally come up with the right words, I may edit my entry and explain the confusion, but sometimes even that is not enough.
People might unfollow you if they thought your words offended them, even if that is not what you meant for them to do, without giving you an explanation or simply stating what provoked them enough to press that unfollow button and give up interest in what you have to say. This, I think, is the main reason why people spend some time to filter their thoughts and even more time thinking about how to word them perfectly in a way that wouldn’t offend anyone in any way, even involuntarily.
Is that necessary? I don’t know, maybe to some people it is, but personally I think it’s too perfect. Humans make mistakes; even the most eloquent people I know use the wrong words for things sometimes. But it goes even further than that. Your followers don’t pay you to please them, so you shouldn’t feel obliged to. As long as you don’t mean any harm, and you don’t cross moral lines, you should be able to say whatever you want, however you want to say it. Your blog, Twitter or Tumblr account is your personal space on the internet and you may use it freely to express what you think and what appeals to you, not what you think would appeal to others. Unless of course you use it to insult other individuals or groups, then get out of the web, you’re using up space!