Protesters were posting large chunks of text multiple times into the blockchain as a way to protest against the controversial increase of block size.
tx 08893442680a20c4d0548dec2c8c421fa43336528b4e274dbf2652774f9c9f2d has the first copy of:
I like big blocks and I can not lie
which is the first line of a parody on:
I like big butts and I cannot lie
from the Baby Got Back hip-hop song.
tx 52159222289cd0a5afe0644150d0e23d5d272a57365627d5e869fdb458289858 has the first copy of:
Time to roll out bigger blocks
which is likely a copy of an email from the bitcoin development mailing list. This message is repeated dozens of times in other transactions.
tx 210000d1392bec2505d1289e5c39c2039204ff1ecf7eef55f973ccd3111003e1, block 360235 (2015-06-10) and the following transactions have transcripts of a very long developer chat starting with:
jgarzik: if you aren't near one of the consulates there are some companies that will charge you money to do it...
TODO purpose? The transcripts are interspersed with developers likely voting for project leadership, and commenting on Gavin.
TODO find original discussion location, these are almost certainly from one of the Bitcoin IRC channels.
Part of the goal of this dump is that the Bitcoin developers have a policy of not allowing logging on their talk channel, and this released it all to the blockchain forever where it cannot be deleted. These might just be more of protests against larger block sizes.