You still haven't explained the justification in endlessly reapplying taxes, an item that exits and re-enters the EU gets clobbered by the same taxes again. That's clearly unjustified but you seem to be arguing whatever a government decides is only right and fair, history is full of examples of this not being the case.
You're also prattling on here as if any of us have broken the law, we have not. As I stated above, £18 or under and you won't be liable for extra charges unless it fits into certain categories like alcohol or tobacco, up to £40 if it's marked as a gift. Taking full advantage of the law to make sure you don't accidentally pay extra is only sensible and exactly what millions of people in this country do on a daily basis.
Your claim about Government losing tens of billions to individuals and companies is a load of crap, if those individuals or companies you talk about are breaking the law then why aren't you doing something about a crime being committed? The law isn't there for you to punish those people and companies you dislike and I'd be more interested in debating this with you if your argument weren't so two dimensional. Sensible taxation should go hand in hand with sensible expenditure.