"So was Julian Asshole’s big idea just to establish Wikileaks as the worlds largest malware market?"
I think there's a little more to it than that. The main problem is tampering: if they removed all the attachments then they're basically changing the e-mails contents. Which raises an obvious question: if they think it's ok to alter e-mails like that (remove attachments) then what guarantees are left that they didn't change even more?
So I don't think they have much other alternatives here. But I fully agree that more and better warnings should have be put in place.