Can You Watch Games, and/or Make a Game Open for Watching?
Yeah, I believe that the default setting for new threads is Group 0, which anyone can see. If you archive a thread, it also becomes viewable to the public (which means you've got to be careful if you archive threads in Adult games...plan on editing before archiving, unless you relegate the Adult-only material to a specific thread that never gets archived. I'm not sure if there's an option to edit an archived thread, but even if there is, you should edit it BEFORE it becomes publicly accessible.)
I've done that a few times in the past, with games that looked like they had an interesting premise, but I wasn't too sure about (probably should have done it with a few others that I actually joined, as well)...check in every so often to see how things were progressing. I believe that's one of the reasons that games you look at are automatically added to your list on the Main Menu...so you have the option of checking in on them for a little while, before decided whether to RTJ or not (or, it may be some other reason and that's just the only reason I keep them on my list...)