Tainted?
This is an interesting piece about think tanks that have written negative pieces about open source and their possible conflicts of interest. Like just about everything invented by man, open source has some plusses and minuses. Although some of these groups definitely sound biased against open source, some of the others make some pretty good points.
The comparison to PM is not really appropriate. PM knew that cigarettes were shown to be harmful in scientific studies and tried to basically promote falsehoods. Closed source vs. open source is much less scientific than that and it would be extremely difficult to scientifically prove any assertions about the harm or benefits of either. It is more of a matter of opininon and last I checked, in the US at least, expressing your opinions is still legal.
p.s. I wish my blog entries were as polished and researched as this one is. Quite a nice piece of work.