Rob,
I don't want to step on your toes here, I respect you. I don't want to step on any LEO's toes.
But you asked what would they gain?
I'll answer with a question of my own. What would an LEO have to gain by hitting a man on a bicycle with a riot stick so hard that it gave the man a two inch laceration through his helmet and temporarily paralyzed his left leg? Not attempting to make any arrest. Leaving the man lying in the street, semiconscious, in the middle of the night. A car rolled by within six inches of this man's head. The man was rescued by friends and did not know what had happened to him as he never saw the cop. It was not until the cop started bragging about the "hippy he'd brained" several days later, that the man knew what had happened. This is not hearsay. The man was me. This happened to me in the spring of 1974 at Middle Georgia College in Cochran, Georgia. The cop, Walker Floyd, was an LEO employed by the Middle Georgia College Police. His chief was Robert(Bob) Raul.
What did he gain? He brained a hippy.
Oh, in case anyone checks this out, I almost left out one small detail-I was streaking. This was back during the original streaking craze and I had the misfortune to overhear Chief Raul's instructions to his force for the evening's "festivities." To paraphrase, for I certainly don't rememember word for word: "Arrest no one for simply streaking. If they are not harrassing individuals, destroying property, or violating other laws...leave them alone." I figured,"Hell, if they are not going to arrest me, I'll do it." It got by me that he didn't tell them not to try to kill anyone. Reckon he thought that went without saying. Thank God I decided to wear a helmet.
There are people who do illogical things for they are not guided by logic. There are people who do unethical things for they are not ethical. There are people who commit aggression for they are aggressive. Some of them are LEO's.
Other than that, I agree, the hacksaw business seems strange.