If a tranny doesn't disclose their trans status to a person upfront before sex or whatever, then they absolutely deserve for someone to flip out on them. A TIM is still a male, doesn't matter if they have manboobs or got their dick inverted. Straight men do not want to fuck men, no matter how feminine they appear as. And the fact a tranny would withhold that information, because they know the person would reject them because of it, that is rape by deception.
Though, I doubt this rarely happens, because most trannies are pretty easy to clock in real life, though it seems that men don't pick up on it as easily as women do. Anyone who has sex with a tranny most likely already knew they were a tranny. If someone did have sex with a tranny, then "freaked out" and killed them afterwards, I don't think it's because they were tricked, but are instead a self hating gay or bisexual, and are more worried about people finding out. I think recently that happened to a gang member, who was down to fuck a tranny, but was afraid of his gang members finding out, so killed the tranny so his fellow gangbangers wouldn't think he's a fag.