Yes, there are, right after the part of my post you bolded. 

"Why? Why does a group of guys liking a show creep you out? If your answer is that it's a girl's show, then why does a group of guys liking a girl's show creep you out? Please do not use the phrase "it's a girl's show" in your answer. If we accept that everyone has different interests, what makes an interest in a girl's show bad? "

So you're saying that it's because of R34 stuff, which I and many others don't participate in or enjoy in any way whatsoever. Okay, let's look at other fandoms. If there is any R34 stuff in Metal Gear Solid, does that mean that everyone who is a fan of MGS must enjoy it? Or what about with Zelda? Does the existence of R34 Zelda mean that everyone who is a fan of Zelda games must like the R34 Zelda stuff? Or is it that the existence of R34 stuff is something that may not be a defining feature of a fandom and can be ignored by many people within that fandom?

If anyone was saying that about a girl with a boy's show, or clothing, or toys, or pasttime it would immediately be called sexism. 

Just saying it doesn't fit a gender role is not an argument in itself, you have to explain why it's bad.

I could change my avatar to a Samus one and pretend I'm a girl if you want.

Step 1: Stop being sexist pigs
Step 2: Don't freak out about the presence of girls...they play games too.
Step 3: ????
Step 4: Profit!

If your offended I'm sorry, it's just the way I grew up grown men watching a little girls show is not really acceptable. My god I can't imagine my dad doing this in a million years. The reason it creeps me out so much is probably from the internet molding my mind of seeing to many weird asain people being obsessed with stuff like this, some even going as far as marrying a video game character, or having sex with some anime character on a pillow Dafuq?? I'm not saying you guys are all similar to that but it just seems odd for a grown man liking something like that. Like I said I grew up where men are suppose to me manly and not watch stuff like that, instead go outside chop down some trees and smoke a cigar lol

But ya it's just the way I grew up, if you can't accept my opion of what I think about grown men watching ponies then don't judge me, you guys are kind of the minority, most people would agree with me so it's not like I'm waaaay out of line.

Anyway going way off topic.

And as an aside, my girlfriend is a Brony. We watch the show together. suck it.

This is going to sound harsh but

Would you jump off a cliff if the majority agreed with that?

Perhaps it isn't off-topic. If members of a community feel driven by machismo or something similar, this is naturally going to be off-putting to most women.

The majority wouldn't be stupid enough to jump off a cliff unless your garunteed to live unharmed.

you make a good point, still we've talked about ponies enough, other schemes to lure women would be much appreciated :)