Nice. 
However, as an argument, it slightly misses the mark, because it illustrates creativity, wit and purpose. Those users won’t ever get stopped by an automated detection, short of plugging SHODAN into Discourse.
On the other hand, as it stands, the merely lazy are simply being re-trained to type in two smileys instead of being deterred or taught to post at least a full sentence… and that’s a bit of a shame.