Andrew Gray a écrit :
Bear in mind that copyright is not related to your right not to have your image used in a defamatory or misleading manner - whatever rights the law gives you in this regard you retain whether you hold the copyright or not.
Actually, it is.
Proof: the Wikimedia Foundation *copyrights* its logos under *unfree licenses* exactly for that reason: for being able to control their use more effectively than through trademark law solely.
Some European government agencies do the same: they copyright their photos and make them available under "unfree" licenses because they fear that free licenses may hinder their ability to prevent people from using them in inappropriate ways (read here: advertisements that appear to make them endorse stuff).
*** Before dismissing these fears as unfounded, please note that the Wikimedia Foundation does exactly that. ***
The US government enacted legislation that expressly punishes using government symbols without proper organization; but this legislation happens to be outside copyright law. Apparently, some European agencies don't enjoy that kind of protection, thus their attachment to copyright.