Based off GMod or TF2's trail plugin (Atleast I think that's what's it's called)
It would run off an event, and a command for admins
Turn on- OnImput > Player > SetTrail > TrailData
Turn off- OnImput > Player > SetTrail > NONE
Turn on- /SetTrail PLAYER TrailData
Turn off- /SetTrail PLAYER None
I was hoping it can become like hatmod and with how you can add your own packs, so this would be labeled Trails_NAME.
Also trails would spawn from the CHEST player part.
(I know this was suggested a lot, I just wanted to add more detail on how I would see it)