I would have no problems with a 100-post minimum, however...
If we establish a 100-post minimum for SPAM priviledges, you may have newbies (only interested in the ipod/flat screen promos) posting random (perhaps disruptive) things in all other forums to increase their post count.
If we establish a 100-post minimum AND remove the post, we will have all sorts of posts in other forums with titles like: "Where is the free ipod forum?"
Perhaps I'm thinking worst-case scenario...