Understood. I'm cozy w/my exes, BTW, but I'm also in my mid-fifties and have been married for over 26 years. Two are FB friends I see nearly every day and interact with; another 2 are FB friends who I see a lot less often. Another is a filmmaker who I saw in person (while engaged) but haven't seen or heard from since. And another was an FB friend and has passed away, it's a few years now. I talked to him on the phone maybe 2 months before he died.
But be that as it may, everyone's got a different relationship style. I really don't see the issue with him, as your response was to ignore the "hey baby" (or whatever)-style communications. He thought you should have taken these guys to task, and then you offered him your phone to let him do it if he was so hot to do that.
I think you've gone above and beyond.
If Henry (he's the guy who's deceased) had propositioned me instead of confided in me, I would have laughed. And I would have told my husband and probably not talked/texted with Henry anymore. I wouldn't have felt the need to tear him a new one, and the same is true of Tom, John, Jim, Chris, and Howie. Or of any other exes who might come out of the woodwork.
I don't feel the need to punish people as if they were children, and apparently you don't, either. Your boyfriend needs to learn that figuratively spanking people is unnecessary.
And BTW, I'm sure if an ex persisted, you would react and/or block him, yes? But as a first instance, to go to the nuclear option? That's overreacting.