another argument pro aliases
And another reason not to use windows with valuable data...
Any other OS just as vulnerable to trojan horses if users installs the horses themselves.
True. But almost every horse out there is targeting windows users. So, at least by now, being out of it is being safer...
And the diversity and complexity of the free software ecosystem also makes more difficult to make horses which works out of the box on every setup. Some users will choose gnome, some kde, some unity, some fluxbox, and so on... It's not that easy to write exploits which would work with every possible setup...
300 million windows 7 users are not going to switch to linux. The windows bitcoin client should be hardened as much as possible against these kinds of attacks, because windows users are by far the largest demographic. We need them if bitcoin is to succeed.
Of course, and developers are working hard on this. And hopefully, p2sh will be a step in that direction. But people have to know that they have safer choices...