LOL...did the ruling benefit millionaires and billionaires who wanted to hide their identities? Did he rule the same way in Doe v Reed? Thomas was the lone dissenter there and appears to have been chastised by Scalia himself in his concurrence to the majority opinion.
There are laws against threats and intimidation; and harsh criticism, short of unlawful action, is a price our people have traditionally been willing to pay for self-governance. Requiring people to stand up in public for their political acts fosters civic courage, without which democracy is doomed. For my part, I do not look forward to a society which, thanks to the Supreme Court, campaigns anonymously and even exercises the direct democracy of initiative and referendum hidden from public scrutiny and protected from the accountability of criticism. This does not resemble the Home of the Brave.
Thomas has a record of wanting to allow the wealthy to influence politics from the dark...which makes sense given the way he comports himself personally.
So let's make this simple. You are the billionaire owner of a real estate conglomerate. ANOTHER real estate conglomerate has business before the court where a ruling in ITS favor would greatly benefit YOU. You lavish hundreds of thousands of dollars in gifts and cover the expenses of a presiding justice who rules in your favor and you don't see that as a problem. I get it. You should probably remove phrases like "the appearance of impropriety" from your vocabulary.