Not paranoid, just sensible. They can hide all sorts of dodgy stuff in there. The most dubious thing I ever saw hidden in small text (and it was really small, like, vanishingly small, in pale grey, and the only small text in the document) was on a booking for an engineer to do PAT testing for the modest sum of £5. The vanishingly small grey text read "In addition to the PAT testing, our engineer will also test your sockets for an additional charge of £30. If you do not wish this test to be done [emphasis mine], please tell the engineer when he arrives." That's only borderline legal.