But that would be so simple... where is the fun in that?
Some problems are nice to have.
Luckily, they have become more complex characters overtime, not simple mindless monsters. At the same time, some very bad writers kind of abuse them, like the whole twilight saga, that makes vampires a real joke. One thing is to make vampires likeable, as vampire chronicles, and another is to made them ridiculous stupid disney pop singers so you can sell them to horny teenagers.
But overall, they are in quite a good position lately.