I Am Legend

[Haphazzard]

...we're not going to put UV lights everywhere for protection...

They actually use a similar strategy in Thirty Days of Night to kill one, but the vamps cut off the power before he could kill more.  I'm not sure if I liked the ending to that movie or not, it definately was different.

Now, to prevent derailing the thread...I haven't seen I Am Legend, but I really want to.  I heard on the radio that the alternate ending on the DVD is closer to the ending in the book.

[SA]

Closer, but still a significant diversion.  The big point being that the book is given its title expressly because Neville (in the novel) becomes a figure in vampiric legend when vampires become the dominant form of life, and he, unaware of their intelligence, culls and dissects them like animals.  I would have loved to see that element explored more in the movie - would have distinguished it from all the other zombie/infected movies - but no luck.