NO I am not making this post just to get to the 15 post requirement. This is a legit suggestion.
I personally think the 15 post requirement is pretty dumb. If you want more people to come to this site, or to STAY on this site, make it around 3 or 5 post requirement. I say this, because people are gonna start spamming on random threads, thus getting banned very quickly. This is easily the worst way to run a website if your users are going to keep getting banned, and never coming back. Hope you take this into consideration!