The Scriptures suggest we should ..'.not be ignorant of spiritual gifts'.
A couple of things on this chestnut:
Thomas Creedy has reviewed Frank Viola's critique of Strange Fire (which you can download and read for free for the next few days)
Also, John Piper has now offered some thoughts on Strange Fire.
('Strange fire' was the number one trending issue on twitter a couple of weeks ago so it seems many are interested in these things)