This is part of the reason why I only dip my toes into the metaphorical pool of fandom... people can be ridiculous sometimes. Just because one character gets in the way of an OTP doesn't make her/him a bad character or a "slut" (I hate that word, too.) or whatever. I ship my ships and love my characters for my reasons that I don't need to justify with anyone else... and I honestly don't care what they think, because I go by the 'ship and let ship' policy. If you like the ship, awesome! Let's talk about it. If you don't, that's fine, too! We can even talk about it. Let's just be civil and kind and mature about our difference of opinion. And that doesn't include insulting another character like you mention.

*eyeroll* People.