PLEASE note: I'm not trying to accuse anyone, this is just a pre-caution because it's better safe than sorry.
I'd like to suggest that our sign ups (For the +3 day preps fights, in other words most official wars) become
PRIVATE AND ONLY ACCESSABLE BY RAID LEADERS+There is a reason for this, anyone can intro to WG and within 2 days, he'll become a trial guardian, where that person can access our war forums and may leak some warring information to the other clan. I'm not refering to our trial guardians, I'm refering to the spies in this case.
Think about it, if they manage to see our sign ups then they can find out the perfect targets for piling before we meet them in CW, they also may adjust their tactics accordingly.
Again, please note: I'm not saying this because this happened and/or someone leaked war info, I'm saying this just as a precaution for wars in the future (Mainly RAWs and the officials)
Short prep fights (1-2 days) should have public sign ups since they really wouldn't matter much

There is no harm at all in linking to a private thread/pm so people can sign up instead of posting on the war thread. It'll keep these info safe and in the same time keep people anxious and excited about our turn-out.
Thoughts, opinions, etc? Post away