From watching Can't Pay, We'll Take It Away, I don't think not acknowledging the debt achieves anything at all.
That show shows mostly a load of folks that seem to not even know their own rights.
And new laws for October 2017 means any debt collector has to send a pre advice before any court action giving the potential debtor time to prove the debt is not theirs, or come to a suitable payment plan with a debt charity such as step change or national debt line.
CCJ for personal debt hardly results in goods taken if you have no assets, only homeowners and those who own their cars worth more then £2000 outright should worry if they have none secured debt.
Those who do not own a home and hire purchase their car or do not own a car of any worth have little to worry about.
Only council, tax and fines are enforceable by bailiffs, and secured debt. Anything else, well good luck... Most debt collection companies know this, but still try it on. Debit collectors have no more power then I do to ask for money from someone.