What? Shall we paint targets on their kevlar vests, too?
Prudence is one thing. Suicide is another, FRiend.
Coming from a nuclear surety era, where we could not under any circumstances risk a mistake, the rules have to reflect the seriousness of the task. If you want to avoid stupid decisions and needless death you had better make the rules such that the result is no stupid bureaucratic murders in the name of injustice, and the servants of the people have the responsibility of seeing that such rules are carried out.
IMHO the risk should be on their shoulders, not the other way around. I take great issue with no knock raids in the name of the WOD, be it swat team or individuals. I take great issue with plain clothes, armed warrant service in the dark. The people are INNOCENT until proven guilty IN A COURT OF LAW, not upon being suspect or having a warrant issued, period.
To expect anything less, is placing too much power in the hands of the enforcer, when warrant service is not enforcement. I'm sure much more could be said and there will be opinions on both sides of the issue. This happens to be mine.