The point about critical thinking is not that new, really. If students are uncritical thinkers, we need to point out, it could be because the glamour of "online text " fries their brains; or it could be that A levels (in parts of the UK) have gone down the route of teaching to the test so far that students leave school without saying "I object" enough.
Maybe both. The standard answer "WP is not actually responsible for what those paid to teach don't teach" often works here.
The point about not citing encyclopedias is really old hat. Once you're in tertiary education you shouldn't cite tertiary sources?