To do with the press, 24 hour rolling news and SM I guess. In the past there was no way of talking about things unless it was over the garden fence or round the tea trolley at work, among a small group of people. Now with SM, you can be talking to hundreds of people on another continent at the push of a button. SM companies are all about content, desperate for content, so they're happy when there's a furore, and most of the sites either aren't moderated or aren't moderated very well.
I'm all for freedom of speech, but allowing people to say what they like with no consequences doesn't make for a happy world. Most of the keyboard warriors will say stuff online they wouldn't dream of saying to someone's face - it's the anonymity that empowers them to say it.
There seems to be an expectation these days that everyone has the right to know everything - fuelled by mostly minor celebrities keeping their star in ascendant by continually creating drama, content and clicks. The Katie Prices and TOWIE types.
The real 'stars', whether that be Hollywood, sports, writers, and yes, the rf etc, keep their personal lives well away from public view, the odd photo, public appearance and snippet of news, especially when they have a new film, book or whatever to promote, but otherwise they keep schtum. They seem to manage it fairly well.