If you really must do it via the internet the best bet is a forum with a pet section that has a rehoming thread (I've used boards.ie over here in Ireland) as boards like that are very well regulated and there are lots of very savvy people keeping an eye out and you can be quite rude insistent with your demands and stipulations.
I drove 3 hours to deliver a kitten to her perfect owner who I 'met' on a rehoming thread and had no qualms as to her safety.
Generally though it's far better to do it via word of mouth... all except two of the kittens I've rehomed have been to friends or friends of friends and they're all very contented well cared for cats and some of them I even get to visit and check up on cuddle.
One of them went to a neighbour down the road and she follows their son to school constantly so I trip over her at the school gates all the time 
Sorry if that's totally irrelevant to whatever gobbledgoop said, missed the deleted post.
Am squeeing at those photos again
Sooooo cute