Looks like Sublime with Rome's lead singer didn't wanna set off anyone's allergies outside his dressing room last night in Napa Valley ... so instead he toked up on-stage.
Sublime with Rome played the Bottlerock festival Friday night with other big artists like Matisyahu and The Cure ... and so far, no one's ratted on the band for smoking out.
As we previously reported, Tucson cops say security for Linkin Park approached them to report Sublime's dressing room weed-fest last weekend -- and said it was because one of the L.P. guys is allergic to smoke.
We're guessing Rome Ramirez lit up on-stage last night in protest.
Or he just wanted to get high.