if you say you're a psi vampire you'll get a lot less heat than if you stood up and said you were a blood sucking vampire, or you cast a spell and became one. while not everyone believes in psi vampires, they are more commonly accepted for the fact they're humans who work with energy, not the Dracula myths we've all learned.
yes, everyone has feelings, and we should be respectful, but sometimes you catch people in a bad mood, the other person's wording came across mean, or they're sick of repeating themselves and a fight will ensue. no one's perfect, it's happen to everyone at some point, but you should start by calmly explaining. then if the person snaps back you have the right to yell at them. [unless you wish to be the bigger person that is]
i think when it comes to vampires, why most people on this site react so angrily is because 90% of vampire topics start with someone boasting and proclaiming they're a Dracula vampire and anyone who disagrees is a moron. sometimes people are confused and want to know if it's possible, but for the most part it's people who go insane when someone provides information to prove they are not a blood sucking vampire, and facts about vampires.
the blood sucking sanguine vampire i don't really believe in myself. i know of people who consume blood [myself i love blood pudding] but it's an iron deficiency normally, not a magical thing. so personally, i don't believe they're real vampires, but i'm not about to yell at them for it either.