I kinda regret not doing a bad thing

Here's the situation. My best friend Erica, whom of which I work with, was sexually harassed by a creepy old married "man" at work and got away with it. I'll spare you the details, a couple months have passed and I still wanna drug him with sleeping pills, take him out to the desert and leave him for the coyotes, but letting the coyotes feast on his putrid disease infested flesh would be animal cruelty LOL 😁. Anywho, he left his cell phone just lying on a table unattended and I was tempted to smash it on the ground and stomp it into a million pieces and put it back on the table to send him a message. Problem is if I did that there would be no doubt in anyone's mind who did it and the boss warned me not to retaliate against the creeper in any way for what he did to Erica since it was a he said she said type situation and they had no "proof" that he harassed Erica. So I just left the phone alone. Am I a bad person for regretting that I didn't destroy his outdated flip phone from the early 90s? I mean come on loser rat boy wake up and smell the millennium for crying out loud, who still has a flip phone LOL 😁. I'm damn near 40 and I still got a windows phone. Johnny Cash is the newest music he likes. Nothing wrong with Johnny Cash of course, I love his music but I like Great Big World, as well as music coming out today. To this loser old school is too new school for him. He's only about 10 years older than me but acts like he went to high school with Noah and that his social security number is 4 lol 😁. Should I have destroyed his ancient cell phone or not? Not exactly no where near what he deserves but about all I can do till I catch him on the street outside of work and go all devil dog on that disgrace to the Air Force.

It has already happened.
So accept what has happened. And let it go.
And next time, you get a chance like this just do it.
Because if you don't, you will regret this time in a much badder way. You might have to pay for your action but come on, is it not worth the mental peace you would be getting, after affecting or harming that guy.