That's mine too but should that be for logged out users? I think the best approach is to disable it for logged out users, why? It allows the community to do its self-moderation approach and once the new users stop being "new" people who browse logged out will see content from those that are not spammers and spam won't have a chance to show up.My preference is to see new users' posts for all the generally acceptable reasons (to greet them and such).
I'm perpetually logged in: whenever I visit hubski, I'm just continuing where I left off without signing out. That said, I may not be comprehending your use of "logged out," nor it's function in the suggested feature. My understanding of your suggestion is users visiting the site without logging in have new user posts not showing up by default? If so, it serves to benefit those logged in with added functionality of toggling, which we have. I think I'm missing something. :o
I'm also perpetually logged in, I just tested the site logged out today to see the difference and it was huge. Maybe it is possible to give that toggle option to logged out users too, save it in their session until they clear the cookies, have it off by default. I am saying this from previous experience as a reddit lurker, as someone who wanted to consume information instead of producing it. Logged out users mostly read what's "hot" or "trending", they rarely go to "new" or "global" so I doubt many of them will be affected by defaulting to have < 2 days old accounts hidden and if it is possible to add an option to toggle it then they won't be affected at all.