Any platforms that allow you talking to other people are social media websites.
Including internet forums, which VJ is.
https://en.wikipedia.org/wiki/Social_media
I agree about work accounts, they're not personal accounts. But any personal accounts, even if you use nicknames instead of real names, should be disclosed, at least with strict interpretation of DOS rules. I'm glad I wasn't subject to these rules. I would have had disclosed many of accounts I have.
And the problem is, this can always be used against current filers, if they forget to list one of tens of accounts they may have.