I've been active on this site for a while now, and I'm just wondering -- what is the deal with all the "guest" answers? Is this a single person who just re-registers for a new "guest" account every few days? I'm guessing there is someone knowledgeable out there who just enjoys interacting in this strange way with the site?
I've never noticed such behavior on other SE sites I've been active on. Is there a story behind this? Is this a particular user (as I assume) or a collection of people who for some reason prefer not to have more permanent accounts? A person who abandoned a registered account because they believed the system was stacked against them somehow? Or is this a sockpuppet of someone who logs out when they want to post a more blunt (and occasionally impolite) answer?
I know this may not be a significant concern, but I ask for a very practical reason that the "guest" accounts occasionally seem to reply to comments or interact, but often not. I don't know whether it's worthwhile giving feedback to these "guest" answers in the form of comments or replies or whatever. I also do believe in the SE model of voting answers up or down based on content, but there are some attitude concerns with the "guest" contributions that make me wonder whether I want to support this user with positive votes. SE seems mostly designed around the model where positive contributors are rewarded pseudonymously and accumulate reputation based on that. I'm just trying to understand how to interact with this nonstandard model for contributing to SE.
Perhaps no one knows more about this for certain, but I thought it couldn't hurt to ask, as "guest" is a pretty frequent and prominent contributor here.