Post split: Scott takes the high road wishing them the best of luck, and they all take turns badmouthing Scott.
To say Scott took the high road is downright wrong. Post-split, Scott went out on his own Core & Purple tour, without anyone else actually in STP and ruining that moment for them to celebrate the older material. Then, he counter-sued them. Now, he continues to be rude to fans and refuses to sign anything STP.
I agree with your other points, but if you're taking an unbiased, factual look at what's happened since Scott and STP split, the fact of the matter is: NOBODY has taken the high road.
With that said, I agree it's ridiculous STP are banning people from their Facebook. I understand it's a promotional thing for them, so they need to have at least a little control over the content of it. But now that people are speaking out about it, it makes them look bad -- especially Brett, a higher-profile fan in the STP community, and especially over stupid things that shouldn't be banned.
I swear... I love this band -- they have been my favorite band in the world since 1992, but they have got to have the most disastrous public relations record of any rock band ever.