Who can think that serious, responsible, sustainable or good for NI?
As any parent knows, rules are there for a reason. Ignoring them does not make them irrelevant. It exposes you to risk & makes you an awkward pain in the ass.
A. Adjust the rules.
This can't be done unilaterally [pointless for a 2-sided border].
#Backstop = an example. Flexibility on both sides means that having as few controls as poss. NI/IRL & GB/NI is *within* the rules