Well, the subject pretty much tells it all: the question is whther having WINE installed will make my Ubuntu vulnerable to viruses/trojans/spyware/et al.

In an attempt to reduce the possibility of malware intended for Windows running under WINE, I didn't associate .exe extensions with WINE: for instance, double-clicking on a Windows executable returns a "no suitable application" warning, and the only way to run .exe's is using a command line. At least, I hope that's the only way.

Is it possible that WINE still runs some accidentally downloaded malware behind my back?