Canned tears

Canned laughter is as stupid as the Idiot Box on a postcard ("for idiots who can't remember where to put the stamp, it's over here"). Self-confident sitcoms don't need it (think "Malcolm in the Middle").
But then, why not also add canned crying to dramas? An audience that can't tell when to guffaw should have as much difficulty identifying a two-hankee moment.

Imagine this:

Jack Dawson: "Never let go."
Rose DeWitt Bukater: "I'll never let go. I'll never let go, Jack."
TEARS TRACK: "BOOHOOHOOOOOO!!! HE'S DEAD!!! WAAAAAAAAAAAHHH!!!"

I think it would add a lot to the cinematic experience, don't you?