1: It's just a weird fetish to have, it ranks somewhere between scat and people that are turned on by people turning into balloons, so unless you're specifically in a fetish community ( and specifically one aimed towards vore) you're essentially just bringing up your bizarre fetish out of nowhere.
2: Unlike many other fetishes it carries a degree of implied sociopathy that might make it especially disturbing to many people in the same way stuff like guro and torture porn might since it is specifically fetishizing death.
3: Vorefags much like futafags are weirdly pushy about their fetish. They cannot be content with simply being into what they are into and accepting that others might not be, they feel obligated to try and force their fetish on everyone else in all circumstances even when wildly inappropriate and then imply that it is the fault of others for not simply accepting this behavior.
tl;dr Vorefags are creepy, autistic psychotic faggots that can't take a hint.