Check out how crazy things have gotten here:
The real lesson here is that if you give petty bureaucrats unlimited power without meaningful review then some of them will abuse it. This is common sense, well-known since ancient times and why there must ALWAYS be some system for oversight over the exercise of ANY power.
Whether its the power of a border agent to bar someone entry or the power to authorize NSA wiretaps there must ALWAYS be some outside review available to prevent mistakes and abuse. Conservatives used to know this.