If the above poster never replies, I would assume that they're referring to (from a quick google) the fact that the EFF opposes laws that would put liabilities for blockchain software on the software author[1], and provides other similar defenses, similar to how the ACLU occasionally defends the free speech of white supremacists[2], to ensure equal protection under the law and avoid setting a bad legal precedent.

[1] https://www.eff.org/issues/blockchain

[2] https://www.aclu.org/news/civil-liberties/defending-speech-w...

edit: Specifically, they probably mean the EFF's opposition to the crypto surveillance provision in the Biden infra bill:

(Summary) https://twitter.com/eff/status/1422337127556157444

(Article) https://www.eff.org/deeplinks/2021/08/cryptocurrency-surveil...