Tumblr co-founder David Karp seems like a fun guy. This is from an article about an email he sent to a Tumblr user who was complaining about the service’s recent issues with uptime:
Karp responded abruptly, saying that “…we have no interest in customers that will go out of their way to discourage our entire team” continuing to say that this is a “…team that regularly spends their nights and weekends working feverishly to provide the best service we can against extraordinary challenges”. He signed off saying that “Plenty of services will import Tumblr blogs. Please go away.”