I've never believed in crating my dogs but thats just a personal preffernce. I feel that the dogs who "cant be trusted alone in your home" just havnt been disciplined enough.
On the other hand I have a pit bull, if I had a poodle or some toy breed I think the case might be different. A lot of dogs feel safe and protected in their crate and is helpful when traveling. I just dont care for the owner's who crate out of laziness but sometimes its hard to distinguish between responsible craters and lazies. Too many people try to train the dog out of their dog and humanize them to much.
Anywhoo I am a full time worker who has to leave my girl home everyday. I am a fanatic about exersicing ANY dog prior to leaving them alone after a long nights rest. Rory mostly gets free rein of the house. I started out with baby gating her in the kitchen and opening up more and more space for her as she got older and more obediant. I have a storage shed in my yard so when i do leave Rory outside on nice days I open up the shed to giver her a safe place and also put her food and water in there. I always make sure she has plenty of chew toys and have picked up all my sandals, remotes, shoes,and other things that might tempt her. The worst thing she has damaged was my brand new ipod but she was only 4 months old and was totally my fault.