This is the land of Barovia. A literal land of undead. People see more weird stuff happen in a day than regular Forgotten Realms people do in a year. No, I'm not that worried. No, it doesn't force a DM into a corner.
Barovia is full of undead...that constantly terrorize and kill people. It would end up about the same as if a guy was walking through town shooting guns at random targets. Most people would flee, while the ones who can fight are probably going to put him down ASAP and ask questions later.
I'll probably be dealing with this issue soon as I have a table with 2 necromancers both of which have Dark Gifts already. There are a shitload of LG people and paladin in this plane. Also, the highest charisma score in the party is a 12. Ouch!