Fr. Feeney answered correctly, we do not know where a BOD person would spend eternity because we mere humans cannot know. Heck, if we are to be honest about it, we cannot even know if the BOD person ever actually desired baptism, much less where he spends eternity.
This is a practical issue though. BOD as a doctrine doesn't say definitively whether any specific individuals really desired baptism, only "if they did, this is what would happen"
The saints and theologians who reward the BODer with heaven, no matter how positive they seem to be, are only speculating because that's all they can do in this matter.
Trent at least seems to imply it, as a possibility.
This is not true. Most who accept the dogma believe those who believe in a BOD are in error, not heretics. My opinion is when that belief turns to incessant preaching about a BOD - then the preacher is preaching heresy, but I do not think him a heretic. OTOH, When it gets to the point like it did with Lover of Truth where he blindly spammed the forums with dozens upon dozens of a BOD that continued for week after week even months, then that person has earned the title of heretic.
Leaving aside that you pretty much seem to be deciding heresy vs error based on annoyance level, I didn't say that *you* think all who believe in BOD are heretics. I didn't say *all* or *most* "feeneyites" think that. I just said that many do, which is true.
The only way you could argue would be I guess to say those people are really dimondites and not feeneyites, which I guess is an issue of terminology. I use the phrase loosely anyway.
It would be nice for the "true" pope to come out and explicitly condemn or infallibly define a BOD, but I'd be surprised if that happens in our life time. In the mean time, the debates will go on with BODers quoting the Fathers and misunderstanding Trent, while the EENSers will go on quoting the Fathers and echoing Trent.
To be clear, I am not sede just like you aren't, I just worded it that way 'cause I know some people here are.
At any rate, BODers vs EENSers is a really weird way to frame the debate. First, we all believe in EENS here. Second,as Ladislaus has pointed out before, its possible even to hold to strict EENS and still believe in BOD.