On: I'm leaving the Internet for a year

[gsivil]

I will be running the marathon under three hours. Top comment: It has been done before

[danellis → gsivil]

You seem to be interpreting the comment as suggesting that there is no point in the endeavor. It can equally be read as simply offering another perspective or showing what might be expected.

[tptacek → danellis]

I was being a little dismissive.

[jasonshen → tptacek]

Way to be honest! =)