I’m not saying anything is more correct than anything else. The problem is people are literally getting their facts wrong: they’re claiming the silver mirror thing is an original part of the folklore from centuries past even though it’s just a modern pop culture invention. It’s misinformation plain and simple.

By characterizing the silver mirror thing as a traditional part of the folklore they’re giving it an air of authenticity and suggesting it’s something every author should consider in a vampire story. But it’s not. It’s like telling someone they don’t know how magic works because they didn’t follow the same rules as Harry Potter.