Honestly, I don't view fursuiters and cosplayers to be that different, and my sister really getting into cosplay further my thought that cosplay isn't anything weird. I don't see any problems with it, if you enjoy it and it doesn't hurt anyone, I'm all for it.
I feel like a lot of those types of communities get a bad rep due to a couple of bad examples of people taking it too far. Most of them are just normal people who like doing things like dressing up like an anthropomorphic fox or a video game character. Even in other hobbies, with groups like weebs (not saying that as a derogatory term, I watch a bunch of anime shows) or bronies, most are just normal people who like a certain TV show or a certain genre of TV shows. Then you have the weird ass people joining those fandoms and doing stuff like marrying a technicolor horse plushie, and those people give a bad rep for the rest of the normal part of those groups.
Oh shit son, you just popped a can of pringles of a rant just now...
I absolutely hate Cosplayers. It's become this f***ed up thing where women now bait men into paying for some stupid patreon tiers thing and its literally baiting. They show you a few pics, then they show you a few more with less clothes, guys are pervs, we just are. Porn is also an addiction and so is being a sex addict, a lot of these people are already overly desensitized to real life sex and get off on these baiting weirdo's that want to dress like a cartoon rabbit getting naked for "lewds" as the clowns like to call it.
Sure, there are some that do Cosplay because they love a character, but man, 9 times out of 10, the character these women love are the most half naked sexualized characters in gaming/anime/cartoon existence. These guys have ruined it for me to even see the best Cosplays, like I love an amazing Gears of War, Halo, or even some other games and characters Cosplays, but then there are these "thots" that show up and just get half naked and just crap all over it. I am a huge comic book dork, I go to these Conventions to meet the artists and sometimes buy art work and some comics as well, but when I see these idiots, it just makes me so angry.
It's like you can have 100 amazing characters in a game, there's 1 "thot" as these kids call them these days, that is half naked, guess which character 99% of the female cosplayers pick?
Your sister definitely isn't one of these a-holes, but man, it's such an annoyance for me. I browse Imgur, all I see is that shit on it now, if I wanted to see that crap, I'd join reddit and some really twisted subreddits.