Nobody can censor Bitcoin transactions. Censoring implies that you have enough power to avoid that a transaction can be done. It doesn't exist a pool with enough power to avoid a transaction. I don't see this behaviour as "censoring". It's just an anti-economical behaviour because it would lost fees.

If a pool avoids to include a transaction, whatever the reason it is, there are other pools that will bring this transaction into a block. So there are not "censored transactions".

Even if many pools censor the same transactions, Bitcoin's free entry allows you to build a mining pool that includes these "censored" transactions, so they are not censored by any means.