Does anyone know how I could implement a disclaimer popup window that would come up the first time a user posts something to a forum. I was thinking something like an agreement not to post content that would be offensive or hateful, where the user would have to check agree before being able to post a topic. This sounds like a job for a flexinode, but I think I tried adding a new content type that would be a sticky at top of lists and allowed that content type to be published to the forum taxonomy term but it didn't work out.

Any suggestions?