Well, Crappy Image verification is NOT going to stop bots build from today onward.
With our current technology, it won't be too long before a basic guide/code template for bots that can easily bypass captcha and image verification becomes common place.

Bypassing a quiz that asks for knowledge of the post, especially if you have to actually understand the post (no "what was the first word on the second line" or "what is the main subject of the post") would require relatively good AI, which would need more space to be hosted and/or time to be created, which would reduce their prevalence (unless, of course, someone begins selling them specifically for that purpose).

I imagine questions like
" in this post, which of these did the author recommend for stopping stupid comments?

1. kill those #€!!!€#
2. Force them to read it ! time the bastards.
3. Get them to prove they read it !
   "

Most Plz follows and Good Post would, indeed, be eliminated this way, or the poster would unknowingly be forced to actual ingest the post before posting, which might tempt them to actually comment something more interesting than just "Amazing post, I love you... Love me back !!!"