I drop a leave a response when I like a post on a blog or if I have something to valuable to contribute to the conversation. It's triggered by the passion communicated in the article I browsed.
And on this article GM Werkzeugmaschinen. I was moved enough to post a comment

I do have some questions for you if you don't mind. Could it be simply me or do some of the responses appear like coming from brain dead people? :-P And, if you are posting at other sites, I would like to keep up with you.
Could you make a list all of your communal sites like your Facebook page, twitter feed, or linkedin profile?