A submodule (like 'jQuery Impromptu') should not be required to offer the core functionality like the one from this module.
There are numerous examples which do not need such a module, just to select/ deselect some binary option.
Even an simple radio button would do just fine.

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not_Dries_Buytaert’s picture

not_Dries_Buytaert commented

The 'jQuery Impromptu' component being just optional/ compatible with the 'CCK Field Privacy' module would be fine, though.

Please, note that some web browsers (of mobile phones e.g.) do handle html (incl. input/ form elements/ controls), but may not support javascript based user input prompts, like:
http://trentrichardson.com/Impromptu/index.php

These are examples of modules with a similar function (to override default field permission settings) and which do not require non-html input/ controls:
for cck-fields only http://drupal.org/project/privacy
for user profiles only: http://drupal.org/project/profile_privacy