Merv, if it wasn't for this people would've found something else to complain about, people always want to complain. And again the attacks are EXTREMELY rare and the vampires don't really pose much threat even at high levels.
10 in a row is rare? With enemies that can one-hit-kill civilians?
I'd deal with them if it were possible.
Sometimes they spawn by the gate I enter into, but usually they're in the middle of town with a pile of bodies before I can even see them.
Casting Slow Time and sweeping the whole map every time I enter a town or exit a building isn't fun. Dawnguard isn't fun.
It could be incredible, but this nuisance is far too unbearable.