As I've pointed out in other threads, social media can be used for good - check out some of Yashar Ali's work on Twitter, for instance - and it can be a bad thing. It can bring out the best and worst in people. It is not, in itself, good or bad.Social media is a disease. Time for people to talk to each other instead of instagramming everything. Old school rule: if you don't say it to my face, I'm not listening.
Most fans of Hanyu probably know that Weir is a skater that Hanyu has long admired and been inspired by. If some of the ugliness towards Medvedeva is a deranged form of admiration for Hanyu, it's good for a skater like Weir to speak out about it. Even if not, it's good to publicly support a fellow skater.