Then you're a fool. Our system to combat spamming is called THE OD NOTOR and so far - it's been working I think. Imagine you post a topic saying "Help how do i add stuff to a dropdown list?" then find out the answer - you'll lock it. But what if someone wants help adding stuff to a popup menu? Or wants to remove something from a popupmenu. A new topic has to be made, when it could just be added to yours.
Also, Terror locked his thread without even posting a solution, he just said it was fixed. How is that helpful or beneficial to the community? Its like going on Wikipedia, adding a new page and then locking it somehow so that nobody can add/edit it.
Overall, your silly idea will produce MORE spam in the longrun i expect, although it can't be classed as spam. It'll just be people asking the same question in another thread because you were worried someone might spam the thread you don't even use anymore.