Hi Simon
In reality, it is very rare bailiffs will be instructed on an unsecured debt (ie from C cards, loans etc). This can always be avioded if you participate in any CCJ action, and you stick to repayments as agreed by the CCJ. A court will only make you pay what you can afford. Things get more complicated if you're a house owner, but as you're not, it should be relatively straight forward.
The biggest problem will most probably be the volume of calls from chasing creditors, if you refuse to speak to them they will probably be relentless - at least for a period of time. They may also send debt collection agents round - but these are simply face to face versions of what you get on the phones, with no powers to gain entry or take your goods - in other words, you can simply ask them to leave.
So yes you can keep them at bay and not pay, but it would probably be in your best interest to sort out a proper I&E and offer pro rata payments based on what you can afford until such a time you can go for a IVA or BR. As Ang has suggested, you could do a DMP if you dont want the agrro of doing it all yourself.