Depends on the situation and the crime in question. While the cops are peaceably presenting a warrant at the front door, an accomplice is flushing evidence down the toilet, scooting out the back door, or taking aim on the cops.
gee...that was just stupid. Let me give you a primer. How about before you do anything you let the guy/guys or gal go out for food, church, anything. Make sure the residence is clear and the CORRECT one. Then turn off electricity, water and phone. Jam cell phones and use the brand new super duper radios that the feds gave everybody or use wireless text to communicate. If you NEED to go into a house then make sure the house is not working. You ain't gonna get but one flush without water.
My point is that snatching somebody and taking them back to their homes accomplishes the same thing.
Finally if you haven't secured the area and let somebody out of the back, then your junior Barney Fife badge needs to be taken away. Same goes for over watch to look for shooters/snipers.
Planning and intel make the ambush possible. These guys are just clowns playing dress up and pretending they're Spec Ops guys.
I'm pretty much an anti-lawyer kind of guy, but if somebody did this to my family I'd make it my hobby to sue every cop, area commander, chief of police, and city council member in order to make them change their policy.
this is just plain bs. Most really good police work involves somebody using their brains and not a boot on the door.