Introduces an intentional conflict with Mono packages
NOTE: This version seems to have broken in more recent versions of Ubuntu because Mono package names have broken. The instructions for making your own version are pretty simple (I just haven't gotten around to doing it myself). You can find them in my initial post on Mononono at Groklaw and use the control file below as a starting point to tweak the list of excluded packages. I now have less of a bone to pick with Mono over the stuff that MS has explicitly offered, but am still skeptical over the areas where they have not freely offered protection from threat.
By creating an intentional conflict with mono packages, this package can be installed to prevent Mono from being installed (or at least force you to address the conflict)