Get this topic to X posts and X posts only

"Get this topic to X posts and X posts only" is a recurring topic where X is an number of posts of that the topic creator (TC) wants CE to get the topic to, but stop posting afterward. It never works as there is always one person who cannot resist messing it up or somebody who reads the topic and posts without refreshing the page first. As a result, "At it takes is one troll" is commonly posted in these topics.

The CEman randy_123r is notable for regularly creating "Get this topic to 12 posts and 12 posts only" topics, which, as expected, always fail.

Example
TC: Get this topic to 5 posts and 5 posts only. Please? User1: Sure. User2: This never works... User3: post User4: And let's do this. Troll: I can't resist!