What Piazza's terms say
Piazza's terms of service and privacy policy have 10 rated points: 0 serious, 2 bad, 7 worth knowing and 1 good. 7 apply whenever you use the site, signed in or not; 3 only once you have an account.
Whenever you use Piazza
Bad 2
You waive your right to a class action
You waive your right to a class action.
Referring and/or exit pages are tracked
This service tracks which web page referred you to it
Worth knowing 5
There is a date of the last update of the agreements
Your personal data may be aggregated into statistics
Your personal data is aggregated into statistics
Your IP address is collected, which can be used to view your approximate location
You agree to defend, indemnify, and hold the service harmless in case of a claim related to your use of the service
Do Not Track (DNT) headers are ignored and you are tracked anyway even if you set this header
Do Not Track (DNT) headers are ignored and you are tracked anyway even if you set this header.
If you have a Piazza account
Worth knowing 2
Your content can be distributed through any media known now or in the future
Banned users are prohibited from creating a new account
Users who have been permanently banned from this service are not allowed to re-register under a new account
Good 1
Pseudonyms are allowed
Pseudonyms are allowed
The documents
Ratings by ToS;DR volunteers; they can lag behind the current terms. Not legal advice.