Anyone else notice that you both compared server sizes? This sounds like "mine's bigger than yours" ... wait, it IS that advanced argument.
BLUF: Hotmail is not secure in itself, let alone that it's free. Thinking that it is is stupid. Period.
Why would you think that Microsoft (that has serious vulnerabilities found monthly (hence the patching)) would put more/equal effort into securing it's FREE product than it's PAY products (Windows Desktops, servers, productivity systems, etc)?
Dude, seriously? So you're one of those that believe MAC has only like 5 existing viruses, that UNIX is not a playground to hackers and that Steve Jobs will ensure that no viruses/malware could possibly hit you when you're on the IPAD? Because if you believe that, I've got a LOT of beachfront property for you in Tornado Alley.