Wikimedia-wide WikiProjects (narrow focus)

I'd rather think that the problems in those areas are due to teams sponsored by certain governments and organizations with the aim of pushing certain POVs and discrediting their opponents - but this is rather off topic here. Having written that, I do however think that organized interference from various organizations is going to become an increasing problem; it is obvious that the current system is very vulnerable to this problem - but I have not a clue how to deal with this threat.

Back on subject raised here. Encouraging WikiProject activity is a good idea, if hardly revolutionary. Those that work well on wiki, well, they work well, and their growth should be encouraged. I'd suggest a study to identify the most successful ones, see what makes them work, and develop a set of good practices for others to follow based on their example.