Perfectly fine for you to read each other's spoilers, as long as you keep IC knowledge and OOC knowledge separate. If there is something secret happening I can PM you (or you me).

Any of you with roguish backgrounds will be able to recognise members of 4 of the groups, but the largest group (of 12) doesn't have anyone you recognise from the guild in it.

They are near enough that a shout would be heard by all groups.