I see this around quite a bit (and have had it happen to me on multiple occasions) and it really does annoy me.
Just because someone's a hyena doesn't mean they're going to 'steal all your food', 'attack the pride', or 'kill your cubs'. Most of the time, lions are far more hostile than hyena characters are, anyways. I've seen (especially in FP and Bonfire Island) lions go up to hyenas and tell them that if they didn't leave they'd 'kill them', even if the hyena is just sitting there, innocently, doing absolutely nothing.
Someone being a fox does not automatically deem them a 'terrible danger to your clan'. Sure, in the warrior books foxes may be dangerous to the clan - but FeralHeart isn't the warrior books. Most people who make fox characters do not do so with the sole intent to attack anyone's clan - they most likely want to roleplay without being bothered just like the rest of us do!
Coyotes, like all other species that receive pointless hate, are not on FH to burden you, 'kill' you, or whatever you think they're going to do. They're here to roleplay as the species that they like - it doesn't matter if you don't like this species. It's their choice if they want to roleplay as it, and you shouldn't hate or harass them for doing so.