It'll end when it stops getting more clicks than other types of titles. If anything, it'll probably become more common before that happens. You see it all over

It'll end when it stops getting more clicks than other types of titles. If anything, it'll probably become more common before that happens. You see it all over blogs like this one, but a lot of the traditional mainstream media hasn't caught on to this type of optimization. Just wait until every headline on the front page of the NY Times starts like this...