Because little girls aren't loveually active, that's the difference. Bronies may act like little girls but they are loveually active and that's what makes it even worse.
There are multiple problems with this assumption. For one thing, the really childish bronies are simply a
vocal minority. This also extends to the idiots and starfishs of the fandom. I myself am not the nicest person in the world, but the general attitude most bronies have is a lot more pleasant than most people who would be considered rabid fans of just about anything, not to mention the many awesome bronies out there who are extremely friendly and talented. Secondly, I have personally spoken with an aloveual brony in the past, and before you go and say that nullifies what I said before, you don't have to be loveual yourself to understand love.
On some level I realize this is futile. I know you, Lord Tony. You live to troll. You hate ponies and bronies, and all you're going to do as long as there are pony-related threads is cough up bullstuff excuses as to why we're terrible people and we have terrible tastes.