No - but a lot of travelers find some aspects confusing. For example, think of an infrequent traveler. After being told (and yelled at by TSA) for years to take off their shoes and to take out their liquids and laptops, the person winds up selected for TSA-Pre. Suddenly the person is told to do just the opposite. That can be quite confusing.

The same ges for BE where some basic long established rules regarding seat assignments and carry-on baggage have changed. While buying BE from United directly, United makes its rules abundantly clear. Buying through other channels does not necessarily offer the same (or any) warnings.