Why not? I live in Houston Texas and can't sleep some nights because of the light from the damn flare stacks. Surely some return on the waste energy is better than none. I've done cost/benefit analysis that says that even as a steam turbine preheat loop it makes sense, but my buddies at the site just say "we can't do it". Is this government stupidity, or corporate cupidity, or (lost rhyme thread). The late Admiral RAH got pissed every time he saw a sawmill burning off slash; it pisses me off to see the same waste of BTUs.
Convince me that it makes sense and I'll buy you a beer.