I agree with both of these quotes.
In reference to the first quote, I've noticed that we're a considerably self absorbed fandom sometimes and it bothers me when the bronies I know in real life don't have the common decency to not flood people, who either don't give a shit whatsoever or are unaware of the fandom and - by extension! - also don't give a shit, with presumably nonsensical references and cultural tidbits. Being a brony does not make you suddenly above being annoying, by any means, and I'd be just as annoyed by someone shoehorning ponies into a conversation as I would be bugged by a kid inundating me with his theories regarding the upcoming draft pick for the NFL. Pick up social cues, bronydom, and save the ponies for the people who are actually interested in hearing about them.
To the second quote, being a brony is not so groundbreaking that anyone should feel the need to "come out about it." You're a fan of a show. Feeling the need to come out about being a fan is just inherently pretentious in its entirety. You come out about being a homosexual because that's big and there's a social stigma to it and it takes some level of guts to do. You don't "come out" about watching ponies. "Coming out" to people who don't really know what a brony is is the equivalent of just inopportunely proclaiming your fandom which, as mentioned above, is somewhat annoying and unnecessary. It kind of bothers me that we tend to dramatize our role as a fandom quite often, leading the general public to regard us as some sort of deviant subculture. Why should we feel the need to come out at all, let alone to people who don't get it?
I don't know about the rest of you but my being a brony is only a part of who I am. It adds to the unfolding reality that is my personhood - it doesn't define it by any stretch! When you let bronydom define you, you become a stereotype. When you become a stereotype, you become vulnerable to lampooning and mockery.
The quotes the OP posted are by all means reasonable and relevant, sorry to anyone who disagrees. Our mantra is "love and tolerance." Let's try to actually practice that and consider just where they're coming from.