Just calling a spade a spade. If it sounds like a duck and quacks like a duck…
We have one poster claiming that every individual can come to a proper understanding of truth with just Revelation and themselves (and presumably the Holy Spirit). Aside from the presumed addition of Tradition, how is this really different than the Protestant who claims that Scripture and the Holy Spirit guiding the individual is enough for anyone to gain a proper understanding of truth?
We have another poster claiming that Baptism forgives all sins that a person will ever commit. When called on it to explain the obvious case of someone who becomes a notorious sinner after their baptism there is wriggling going on. I don’t see an essential difference between this response and the OSAS Protestant who claims that once a person is saved by Baptism and/or accepting Jesus as their personal Lord and Savior that they cannot lose that salvation. When they are pressed with the notorious sinner question, they usually fall back on the they obviously weren’t saved to begin with response - and that seems to be where this poster was learing into.
I will say that I don’t actually think these posters are presenting what Orthodoxy actually teaches (not that I’ve ever heard from the Orthodox laity and clergy that I’ve met in real life). I would request they provide some sort of evidence (e.g., cite a Synod of Orthodox Bishops) to show that this is what Orthodoxy really teaches.