Sounds indeed like an interesting idea! Could work the same way one cant shout the first hour ingame.
For the sense of it, I could imagine that newbies wont be able to join a guild the second day for having all the spoilers in the forums. Hence they would have to find their way on their own, asking around and that. That way they surely would be nudged now and then and taught a bit Not a bad thing!
On the other hand though, newbies sooner or later, in the worst case, would make friends of ooc-guildeds, and would have to wait the rest of the month until he can get fully guilded.
Although the positive effect would be less in the latter case, I can still see something good in it.
Okay.. but some more less pleasant point about it:
Its actually already the same dilemma with the tutorial. Just picture you want to form a guild for roleplaying reason, some plot requiring it (or it would make it comfy, whatever). You are a player who is playing for already some years, but still need to wait weeks until your second account is allowed to have chars guilded (in case its account-related, not char-wise like the tut).
