I don't like the idea of kids being taken along on a bike or behind a bike. Too dangerous IMO. Babies and young children are not old enough to say 'Yes Dad, I am happy to risk my life on a bike trailer/balanced high up above the road on a child seat/on a coss bar seat . . . ".
Probably a bit off topic, but you got me going with your comments there!
Interesting point. A few quick replies from my perspective:
Like anything, there are risks (which can be managed and mitigated), and there are very clear benefits.