I think the friendly expert is the way to go, lots of tech questions asked on the enthusiast sites. If a dealer can get their techs to participate that is a great way to go, people really appreciate it. If you've got a tech helping people on a site with a lot of members from your locale you will see people coming in because of their posts. The great thing is lots of techs really enjoy doing this on their own, OK maybe not lots, but they're out there. I guess the best thing to do would be to talk to your techs about if they do or not, and if none are it might be a good idea to identify techs that you think would be good at it and give them some "motivation" to participate. Not sure whats the best way to handle it, you dont want the forum to suddenly be swamped by all your techs.
As far as damage, it can be really bad, and really lasting. God help you if you tick off a
4 c h a n / B / member. Ive seen them swarm and destroy lives, literally force people to move from their homes, crash websites, lower the stock price of APPLE stock etc etc. You're more likely to come across these members on a tuner, import, or website that trends to Generation Y. At their command they can get anything to the top of Googles hot trend list.
(i purposely seperated the letters because of the very real fear that they may somehow come across this post, its like that horror movie, except you dont have to say their name 3 times in a row, once is enough
)
Rule of thumb, you never really know who you're going to tick off, and more often than not its not even the Topic creator.