I for one think the posts are an example unprofessional practices on the part of F2Pool, and are of topical interest to miners considering using the pool. I hope history isn't whitewashed through their removal.
Unprofessional how?
Unprofessional because without Adam Back's HashCash, Bitcoin would not exist.
I don't give a wet fart about meeting the CEO of Blockstream anymore than the CEO of Coinbase.
OTOH it is a great honor to be in the presence of legendary cypherpunk Adam Back, no matter which hat he is or isn't wearing.
If you are too young or low-information to remember the crypto wars and PGP t-shirt, you may be forgiven for prioritizing titles over demonstrated expertise.