of course it's still kidnapping. but it's one thing if they hold her captive for days, it's another if she's back at the BR the next morning. it seemed clear to me that's what I was referring to.
if Vinnie kidnapped her to get information he made a bad deal, he knows much more about Quinn's business than Riona does, more likely he simply wanted to scare her, in the end Quinn's "army" is very small, and such a direct gesture puts a lot of strain on Quinn's authority.
interesting might be the idea of using Riona for a trap for Quinn, but I would discard it, since Quinn knows about the kidnapping.
Riona has only one reason to denounce Vinnie, the fear that it will happen again, otherwise she risks more than she has to gain. absolutely she would risk much less by denouncing Quinn and not Vinnie. to make a deal of having something big in hand, and Riona has nothing.