Indeed, I came across this not as a contractor but in my university textbook :) I wanted to collect the document list that forms the "thousands of pages" mentioned above in the waterfall model.
If people truly understood what waterfall is and how it's supposed to be carried out, they'd be less apt to recommend it. Nothing prevents a team from employing planning in an agile effort, but doing this doesn't turn it into a waterfall project and you shouldn't describe it as such.
If anything, teams that refuse to use agile (thinking it inherently means meetings, story points and not looking beyond 14 days) often send up choosing something even simpler, like cooking up a simple design doc of 4-6 pages before implementing it.
But that's still not waterfall, it's just another of the infinite renditions of agile methods that are out there, just without the consultancies issuing formal training certs.