For example, TF claims that he is under the anathema of Trent. But unless he is or was formally Catholic, this is flatly impossible. I do not understand the seeming fondness of some Protestants for wanting to be condemned by the Catholic Church. Perhaps it is some sort of projection issue: these folks despise the Catholic Faith, and so maybe they think that naturally Catholics or the Church ought to despise them in turn. Their protests notwithstanding, it's just not so, as I've said before. This fact does not mean that Protestant error is no longer reckoned to be erroneous. On the contrary: Trent has in no way been rescinded (of course). It simply means that most Protestants today are incapable of being the subject of any Catholic anathema whatever, because they do not meet a fundamental condition: they have never been Catholic. If he wishes to say that his beliefs have been condemned by the Catholic Church, then he would get no argument from me (to the extent that his views are in fact false and actually under formal condemnation).
In the same post (linked above) where he erroneously claims to be anathematized, TF also says (with regard to Canon 33 on Justification):
Perhaps it is only me, but it seems to me that the folks at Trent realized that what they were doing was dishonoring to God and to the glory of the merits of Christ. Canon 33 is the sort of canon that does not help to define dogma but is instead a sort of "shut up and don't criticize us." It is totally superfluous to the other canons. After all, one could not very well both accept Trent's teaching and simultaneously claim that the glory of God or the merits of Jesus Christ are derogated from by them.
[As an aside, TF is accumulating a history for supposing that general councils act in bad faith. It's one thing to disagree; it's another thing entirely to presume that those with whom one disagrees must be acting in bad faith. But I digress].
TF is not alone in presuming bad faith on the part of others; it's a trivial way to dismiss those who disagree with you. For my part, I think, given the historical context, that Trent's concern in this canon was legitimate. Calvin's standard for pronouncing judgment on the Councils was that "there must be nothing derogatory to Christ;" he suggested (that's putting it mildly) that the Catholic doctrine of "derogates from the dignity of justification." That's just two examples from a quick bit of googling; the point, of course, is that it seems to me the Fathers of Trent in canon 33 are rather obviously addressing charges made against Catholic teaching by the Protestants. But it is an error to say such things: the true doctrine of Justification in no way detracts from God's glory. The very idea is absurd. Hence it's fitting to condemn such a false idea.