On some forums the stickys work like this:
You join the forum and your membership has to be manually accepted (gives a chance to check ip's etc before hand so keep out the TROLLS)
Once you're accepted, the first time you log in you have to read a certain page for 5minutes or you can't do anything on the site.
If you still have questions, there's a part of the forum specifically for these questions and people will be more tolerant there.
I think it's a good idea apart from keeping out trolls. I like them sometimes