It does suck big time.

I agree: many thieves are "opportunity driven" and will just take something for "fun." I had tie-wraps attaching my seat to my bike on my former bike, which proved enough of a deterrent for two years. (One would have needed to have a good pair of scissors to cut the tie-wraps.) Now on a different bike I don't have anything (but the quick release) but I feel like I'm waiting for my seat and seatpost to be stolen. I really hate them and just need to go and replace them, so I haven't bothered securing them. (Silly me.)