Erik,
Can't speak for the entire golf world, of course, but in general, many architects use aiming bunkers, trees, mounds, etc. This discussion board seems generally against them, either because they have been over used or because they believe the course ought to be somehow tougher, harder to read, etc.
I have no real problem with them. They make golfers feel comfortable off the tee, and for the type of courses I design (mostly public) making golfers comfortable is a good thing. They like it, even up to the pro level. In fact, I have co-designed with a half dozen pros, and I would be hard pressed to say any of them was against aiming bunkers, and liked them, suggesting them on nearly every hole that didn't have some other feature to aim at.
Sean A seems to have modified a part of the post out that I was going to respond to, but here it is anyway. IF I have a problem with them, it is that somewhere along the line, I realized it was too easy to do it every time, and like variety on a course. As Sean suggests, he wishes architects would somehow limit themselves in using them, which I have tried to do. In a theoretical sense, I have identified a few dozen "basic" tee shot strategies for full length holes. I need 14 per course, so I try not to repeat any of them, save perhaps repeating one left, one right.
I also like Tom Doak's design strategy of mixing it up. You might have five target bunkers in a row, and then stick in a hole where aiming at that bunker is the absolute worst thing you could do.