But one of the things that popped up was Elegius pool filtering the spam transactions. In general there's a camp that encouraged this mining behavior, but there were also plenty that were frightened by the "slippery slope" nature of this happening. I have more tact than to start bandying about the fact that in Monero you wouldn't be able to filter these transactions.. but could you? I don't know exactly what the spam filter was, but apparently the spam transactions were easily spotted by eye.... would spam filtering be possible in monero? There wouldn't be consistent addresses, so that method is out. There wouldn't be consistent output usage, so that method is out...
The filtering of Eligius is pretty simple, they block common addresses (see
https://blockchain.info/popular-addresses) of well-known gambling services such as
LuckyBit or
SatoshiDice.
This is justified by the fallacy "gambling = spam". I'm pretty sure that if porno related services would have well-known recurring bitcoin addresses, luke-jr would try to call it spam too. He's the guy recording the bible in the blockchain, remember?
Anyway, Monero is exempt from such possibility thanks to stealth addresses. There is no such list of popular addresses like Bitcoin. There is no destination that can be identified as belonging to a service or person.
If you do an analogy with net neutrality, Bitcoin is subject to censorship from miners and full nodes the same way TCP/IP is subject to censorship by ISPs and cable operators. Monero is intrinsically censorship free.
EDIT: Ah and btw, Eligius filtering uses prefix, not specific addresses. So if you happily create a vanity bitcoin address starting with 1Lucky, Eligius will filter your bitcoin activity because you'll be associated to the LuckyBit service.