Hi David,
I agree with the sentiments but suggest that there is much more to successfully exerting influence than simply talking to (or at) someone. Indeed, several of the subsequent contributors have identified particular walls they have hit - or foresee.
They are all real problems, ego, ignorance, lack of perception, fear of being labeled a dobber, fear of isolation and so on. I outlined a few others. There are many more.
I submit that unless personal, social and structural forces are exerted, the best intentioned change efforts are unlikely to succeed.
[quote name='David Isa