I have also experimented with hair-rigging and hooking and only settled with hooking as its quicker and there's less faffing! I don't tend to have any problems with it coming off the hook as the fish tend to hook themselves so you're not striking!
hair rigging for me either a band pulled through or a korum spike thingy [:I]. After messing around for a while im dead set on the hair shallow, the major factor is that the hook is always exposed therefore you hook majority of your bites without striking. One thing i do though is if im using 6mm meat or pellet i always use an eyed 18 b911