Sleep is such an important and personal issue. I don't think there is one right answer for every family. We did family bed with our first baby by accident. She was such a colicy baby, and she had her days and nights mixed up from birth. It was a rough first few weeks, with me not getting ANY sleep at all, until our Pediatrician suggested I take her to bed with me for naps during the day. It worked so well that I started taking her to bed with me at night. We transitioned her to her own bed (a twin mattress on the floor) when she was about 10 months old. When she woke up, I would go sleep there with her for the rest of the night. That lasted for a few months and she began sleeping all night. A few months ago (she's now 2.5) we put her mattress up on a frame. It worked out really well for us.
With our second baby, co-sleeping was by design and from the first night. He sleeps really well and I haven't suffered the weeks of sleep deprivation like I did with my first at all. He's now 5.5 months old and I am starting to transition him. He sleeps in his pack and play in his own room until he wakes up around 2 AM, then I just get him and bring him to bed with me to nurse and sleep the rest of the night.
Anyway, I think parents should try everything that they are comfortable with. Whenever you find the arrangement that works for your family, you should stick to it and be proud of it. The BEST way to arrange sleep in any household is which ever way gets everyone in the family the most quality sleep. I do not understand why this is such a controversy.
All precautions should be taken in a family bed situation, just as they should for a crib sleeping arrangement. There is a great book called "The No Cry Sleep Solution" by Elizabeth Panteley that goes over all kinds of strategies to find the best sleeping arrangemnt for YOUR family, whether you want to crib sleep, co-sleep, mix both, nurse, bottle feed, etc... Her book goes over how to do it with a newborn through the toddler years. I highly recommend the book, it's an easy, quick read.
Anyway, that's my opinion.
