Every reading is a misreading. But some are, admittedly, damn misreadings. We have to keep in the forefront that students will need critical reading skills every time they go through their mail. Advertisers and bureaucracies often count on a misreading to further their causes. Basically, I think there is a division of two types of problems students might have in understanding text.
Continual engagement can begin with a questioning attitude.
The second type of understanding is sexier, especially in the university classroom. But we certainly can't have the latter without the former. Whenever we plot out assignments and tasks for our students that deal with readings, we probably need to begin with the task of comprehending the text.