User blog comment:PlasmoidThunder/Embrace the Plasmo-Bot (AKA Plasmo)/@comment-24796436-20140528195230/@comment-3495717-20140528195704

I'm in complete control of it, by the way ;)

It means they will be absent from the Recent Activity feed, but should you choose to, you can view bot edits. Essentially, they're only invisible to those who wish not to see :)