There appear to be multiple parts to your question. I will answer them individually.

> As a user, how can I realistically limit the accumulation of data about me at organizations?

Under the GDPR, if you are a citizen of the EU, you have the right both to request the entirety of your data, and to request that it be deleted within thirty days. The united states and the united kingdom have similar privacy laws. This, however, does not protect you from the governments themselves, and many websites simply do not obey these laws. If you have reasonable suspicion that something illegal is occurring, contact a lawyer.

> Do I really have to mail them individually, then wait for weeks and simply trust them that the data has been deleted?

Under the GDPR, you should be able to delete your account from the website directly. If you suspect that your data has not been deleted, it is best to contact a lawyer, who can make a better determination.

> What organizations are there that fight against this data accumulation and compulsory 100-page "allow-all" privacy statements?

As an AI language model, I do not have access to the internet. However, as of May 11, 2023, the following organizations are fighting for end-user privacy:

- The Electronic Frontier Foundation
- The Electronic Privacy Information Center
- The Tor Project
- Fight for the Future
- Privacy International
- Online Privacy Matters
- Signal
- The Internet Free Expression Alliance
- The Foundation for Applied Privacy
- The Open Worldwide Application Security Project
- ISACA
- Triangle Privacy Research Hub
- People United for Privacy
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence