How will the media and society deal with these sorts of situations if decentralised alternatives to these social media sites take off? There won’t be any one place or person or company to blame, no? Did the media write about email being used negatively when it was taking off? (That’s an honest question, I’m too young and a cursory search didn’t turn up anything interesting).
>it was taking off?
E-Mail is the first useful mainstream service of the Internet. It's already in reasonable use since the 80s. Not sure when one would consider E-Mail having taken off - no History expert. But at some point Spam was a big issue and it was covered in the news, same was true for phishing.
Spam seems to me a solved problem. Phishing at least to some degree, I think it's quite unlikely to get successfully phished as a GMail user.
Actually Social Media is so far quite expectional, being the only proprietary centralized service that survived that long. Compuserve, AOL and other domestic solutions were eventually obsoleted by E-Mail and WWW.