Re: And the point is?
In the UK there are many who can force entry without a warrant or court order. Most notable are the Customs and Excise bit of HMRC. The list also includes such as gas engineers and disease control personnel. I expect there are similar powers in the USA.
A gas engineer may not have the power of arrest (over and above a normal citizen) but Customs and Excise certainly do search and arrest after simply turning up and demanding entry. I suspect that the disease control personnel may detain with out arrest if required to prevent spread of disease (probably constrained by the need for retrospective court action).
Letting your fingers dance over Google or Wikipedia will get a more definitive answer and a longer list.
From the Guardian 22 January 2013: "Ministers give Whitehall departments two years to decide which of the 1,300 remaining entry powers should be repealed"
Biting the hand that feeds IT
