This idea would increase the moderators work, which is pretty high already.
And merit , in your example, is not a word related to spam.its an important forum feature that needs to be discussed at this moment.
I suggested in other topic that the words related to altcoins such as "ethereum" or "bcash" etc should be automatically moved to the altcoin board
Precisely it would increase the moderators work! Besides the word merit defines as the quality of being particularly
good or worthy (this taken from the dictionary) and should not be used to identify a spam thread. Aside from that since it is automated then you have to made a system on it and incorporate that with this forum and making sure also that there will be no
conflicts among the systems that are running already (Im not pretty sure on this, I am not an IT expert).
One thing about the OP that I like is his character and attitude for the initiative on imparting his ideas and knowledge for the forum.