Jenna Jameson is slamming Tito Ortiz for his DUI bust ... claiming he's putting their children in danger while committing public relations suicide.
Jenna thinks Tito's arrest after crashing his Porsche proves what she's been saying all along -- that Tito's a bad dude, and told us -- "A lot of people think he's this fantastic guy ... it's just not true."
She added, "Slowly but surely he'll hang himself. Not literally, but figuratively."
Jenna also explains how Tito's arrest could lead to her snatching back custody of their 2 boys.