These boasts--I have run across a lot of them and can provide quotes if you like--just will not do.
It isn't even clear that these "boasts" were intended as boasts. They look to me to be cases of people using themselves as examples (at risk of invasion of their privacy), to counter your own claims.
This appears to be the
n-th of your threads about nihilism, where n is something like 4 or 5 (or greater). What could be more boastful than starting that many threads about your own beliefs?