No one should be underestimated, as evidenced by a comment thread on TechCrunch from four years ago.
Then, a founder who raised $10 million in one year wrote a guest post. One of the first comments on the article was written by a user named "evanspiegel." Evan Spiegel is the co-founder of Snapchat, a multi-billion-dollar messaging app. Then, Spiegel was still in school and he was working on a venture that turned into Snapchat.