If the guy was high on PCP and coke, I doubt he was just minding his own business and taking a casual stroll...
I think you'd be wrong. Just like most people who get really loaded on alcohol don't go about bothering people, most people loaded up on coke and/or PCP don't bother people, either.
Sagging pants are neither illegal nor harmful. Otherwise most plumbers would be in jail instead of earning a decent living. Exactly why was Edwards arrested? What law did he break?
BTW, I'm not a fan of excessive use of alcohol, drugs or sagging pants. And I'm really not a fan of tasers. And am especially not a fan of waiting for 10 minutes to begin CPR.