My first reaction is that it should be a slow and agonizing execution.
It does demonstrate one of the negative aspects of the internet. Where once these people would have been more isolated, now they are able to locate like minded criminals and reinforce each others predatory and dangerous predispositions.
Atleast the cyber crimes guys can probably scoop up a bunch of these wackos all at once because they expose themselves when connecting. It does make me think that individual stalkers are much harder top find these days since they no longer hang around parks and play grounds but probably stalk their vicitms on the internet.
I thought this was a fairly limited problem until reports like this and the 20/20 sting shows drag so many of these scumbags out of the dark places they hide.
I agree with Maurice, once they have traveled this path, Im not sure how much rehabilitation can be done. No room for bleeding hearts here IMO. Long sentences are essential.