Then word gets out at the speed of electrons and knocking down doors gets real messy real quick.
That depends on the reaction. If the reaction is compliance, more raids continue until the people submit to the king. If the reaction is the opposite then you open up a whole new can of worms. If gun owners choose to form an operating cells and pass on communications about police movements you have the potential for lots of devastating ambushes on law enforcement, especially if they are bunching up for a raid.
If one or two of these raiding teams are slaughtered to a man it will slow or stop this insanity. The sad thing is those who would have to die to end this tyrannical behavior.