No they can't
"They could quite easily under the GPL: have tasked someone to burn a tarball to a CD and post it out to the guy, charging him €10 for the trouble ... nice little earner !"
It's always interesting to hear all the comments from people who are totally un/misinformed about the GPL and what it does. The above comment is just one example and the poor author should not take offense to being singled out. Most of the other comments rabidly opposing the GPL fall into the same category.
Those of us who know the GPL and how it works truly feel sorry for those of you who feel so threatened when someone wants to share something with you. It's truly sad that you must make such venomous attacks on the GPL or in this case on it's enforcement. Well I'm sure some of us feel sorry for you, others just regard you as idiots.