π© Report: Legal issue(s)
Most of the posts in this dataset, if not all were sourced from people using Bluesky without giving any consent to this kind of data collection. This dataset violated Bluesky's ToS, the GDPR and several other terms by collecting and storing these posts.
For those in the EU, Solicitor Simon McGarr specializes in Data Privacy and Privacy Law in Ireland. He wrote a letter that people can copy and paste to check if Hugging Face is following Article 15 of the GDPR.
https://bsky.app/profile/tupped.bsky.social/post/3lbw3ev7gp22h
https://commission.europa.eu/law/law-topic/data-protection/reform/what-personal-data_en
It depends if the data collected is anonymized or not. I am not qualified to tell if the PID can be trace back to an identifiable person. If it's not, it's conform to GDPR, if it is, the dataset owner just needs to drop/remove the user column.
--- Addentum: I am wrong as someone else explained me, please disregard my comment above