Gmail - Against all odds?

Google has taken drastic steps to fight for spam, and now they are taking mail viruses/trojans seriusly, today when I try to email .exe file to my friend, it gives me the error below.

For sure I'm wondering, are they really that strict? Then I change the file extension to .exe.scr and see if they really block on it, yet I get my answer quickly.
It might be blocking for a attachment that having .exe or .scr extension(considered not payload checking), if you look at the error message closely, it says that .exe.scr is executable file and can't be delivered :P

At some point, this is real good for a fact that most users are just has no idea about security.