Romer was an equal-protection case while Lawrence was a privacy case, but in both of them the court applied the lowest level of scrutiny: It struck down the laws in question on the ground that disapproval of homosexuality was noteven a "rational basis" for the laws under challenge.
Even if we do not see another round of mortgage crises, it's rational to fear more closures and lay-offs in the financial sector, boding ill for London and the wider economy.
Might a rational background check system include maybe being not-so-instant, even if it means that some people might have to wait a few days before purchasing a weapon?
Creating the currency union was not a random act of collective economic suicide, but was in some senses a rational or even noble project that was either premature or too late.