Could you be more precise? Are you repeating the "it's impossible to voluntarily place a work in the public domain" canard? There are well-established precedents in the US and Europe for authors waiving copyright. See djb's FAQ: http://cr.yp.to/publicdomain.html. If you are really paranoid and want a wordy license written in legalese to the same effect, you could use CC0. There's a detailed FAQ here: http://wiki.creativecommons.org/CC0_FAQ. There's also the Unlicense patterned on SQLite's public domain declaration: http://ar.to/2010/01/dissecting-the-unlicense.

In short, if you agree with the philosophical and practical advantages of releasing your code into the public domain, there is no excuse not do so under the guise of legal FUD.