As a non-flipper, I am going to throw my two cents in and say, I like flippers. Honestly, without people actively searching for, fixing up and selling, there is a lot of cool steel that would never be ridden. That it might make it harder for some people who are not in the business and feel that they are crimping their style, but honestly, to bad. Flippers provide a great service to the majority of the population.
I also like this thread - very informative!