It's because most Slashdotters are jealous morons who begrudge anyone else's success.
Seriously, look at any story about someone being successful at something and many of the responses are "well, it was obvious - ANYONE could have done it!"
They never ask the obvious follow-up: if it were obvious, if it were something anyone could have done, why didn't THEY do it and reap the rewards?
These are the same people who come up with an idea and then engage in mental masturbation about how awesome it is and how it's the most amazing thing and then never do a goddamn thing about it, but they act like that's exactly the same thing as coming up with (or borrowing) an idea and executing on it.
Ideas are easy. Everyone knows an "idea guy." But actually making shit happen is harder - extremely hard, in some cases, and takes dedication and time.