On Jul 4, 2014 7:55 AM, "Frédéric Schütz" <schutz(a)mathgen.ch> wrote:
Their main worry seems to be "how do we make sure
that people do not use
the pictures in a way we're not happy with"
That question qualifies as "frequently asked"; my usual answer is to the
effect that "You cannot - but anyone who is going to use them maliciously
is not going to worry about niceties like copyright. The people whose
activities you limit by applying a restrictive license are the good guys -
and yourselves."