I do agree with this above statement. Most of my friends do think that any guy who watches MLP is a homosexual. The "coming out as a Brony" movement solidifies their accusation to the fullest letter. Like you said, it's just a cartoon.
The reason why I joined the Brony movement was because all sorts of talented individuals - artists, writers, videomakers, songwriters - were posting such good pieces of art on the Internet. After seeing such high quality work, I just had to join the herd