[ubuntu-uk] Phishing and linux

[Mac]

I'm not sure what to make of comments about phishing sites I came across 
here

http://www.theregister.com/2007/10/03/ebay_paypal_online_banking/

as follows:

"These things are incredibly sophisticated, and when they take over a 
computer, most [users] don't know it," he said. "With every single 
phishing site [Washington Mutual has] shutdown, not one person was aware 
been aware that their machine was compromised and used for phishing. 
That includes university servers and company servers and personal PCs 
and all sorts of things."

More interesting is that most of the compromised machines were not 
Windows machines. "The vast majority of [the phishing sites] we saw were 
on rootkit-ed Linux boxes, which was rather startling. We expected a 
predominance of Microsoft boxes and that wasn't the case."

Any thoughts?