My students absolutely refuse to learn what comma splices are. I would wager that most people are ignorant in regards to comma splices.
I would wager that one out of ten people MIGHT know how to identify one, but not much more than that.
Conjunction junction, what’s your function?
Given the twitterification/textification of written language, comma spices aren’t grammar sins any longer. Brevity is in. It might even have a soul.
The reason students don’t care to learn to identify comma splices is that they hold no real bearing on today’s written language. It’s the equivalent of the “s” in “defense” in the King’s English.
Put another way, if only 1 in 10 can ID a comma splice, then the only people that would be annoyed by their use are the exact people the Internet generation doesn’t care if they annoy: grammar police. Not knocking on you, just suggesting this battle is lost.