What is everyone's take on selecting the H/handicapped seats, particularly those in row 6? If I don't get an upgrade I will typically try to get a seat in row 6, ideally aisle for the extra leg room. When I can snag 6D, I do, but sometimes 6B/C may be the only ones open.

I'm not handicapped by any stretch of the imagination, just tall, so I would prefer the leg room but don't want to displace a truly deserving passenger of such a seat. My understanding is that I can select the seat as long as its available, with the knowledge that I may be booted if necessary. I've heard from other places I should refrain from selecting it at all unless my condition requires it.

(In practice, I've sat in 6C lots and never been the boot "victim." I'm not even sure what makes seats B&C in rows 6, 10, and 23 "handicapped" seats to begin with or what criteria might justify being placed there.)