XF 1.5 Member disclosure

Hello everyone. After some intense googleing I've found myself stomped.
I am trying to keep the members on my forum 100% anonymous from guest/unregistered visitors except for one and other various article being posted into "official news" forumthread that i got.
I think i have covered pretty much everything, but would like to be able to hide the forum statistic from the guest group. This mainly because it shows "Newest member: John doe"

Is it possible to remove this from the user group "guest" only? Please keep in mind that i am around 78% noob when it comes to html :p