When I was in LE, if a warrant was issued, and the malefactor was not known to be particularly dangerous the detectives usually asked around the squad room if anyone knew the person and if so, if you see him, pick him up. If known to be a bit on the violent side, they'd send a one man or two man uniform car to back up two detectives. Cover most of the exits, pound on the door and announce. That usually got the person, if he was home, to rabbit and we'd catch him leaving the house.
Now if an informant says a guy is selling pot, they send an Mrap, 10 Ninjas, rope off the neighborhood and destroy the house in the process, whether it is the right house or not. This does not happen all the time, but it seems this LE behavior is escalating. Give them military equipment, mask their faces and helmets that resemble helmets worn by the WWII SS, assign a leader with a square jaw and a flat top haircut who talks in monotone, you have a clustercoitus waiting to happen.
We have 315+ million people now, and about 190 million in 1965. Things tend to be relative, so other than is some large cities where violent gang hold sway to reasonably large tracts of a city, arresting folks isn't much different than when I was in LE.