I don’t react at all. Such people reveal themselves for what they are: little frustrated people who always like shooting out of the dark. Some of them are always telling me what I should do or which direction I have to go. If people know better than I how music should sound or are able to write extraordinary music, why they aren’t trying it themselves? The world is big enough for thousands of people to express their life story by composing great stuff day and night.
As a matter of fact: did I myself ever force anybody to buy my music or stop anyone from buying it or the musical output by Tangerine Dream? I certainly never did and I never will do such a thing. Isn’t that simple?