I got a kick out of these tounge in cheek Motivational Posters that take at jab at Debian GNU/Linux for their embarrassingly severe low entropy security hole in their implementation of OpenSSH in May 2008.
I remember seeing some funny FreeBSD Motivational Posters at some point recently too that asseted that FreeBSD users are reliable but boring (I'm a FreeBSD guy of course!), but for the life of me I can't remember where. You'll all be the first to know when I do, even though I'm not Bill Kurtis.
I don't think that's funny, it's more like insulting and deliberate attack against Debian. Sure that mistake happened, but mistakes happen. Making posters like that and posting thenm to internet shows only wery bad taste. It tells a lot more about guy who made that poster than anything else.