On one hand, I do agree that it is very annoying. However, I can kind of understand.
There may be a way around this, but if no session was required, then couldn't someone just make a bunch of GET requests to the unsubscribe url for each user id and unsubscribe the entire user base?
There may be a way around this, but if no session was required, then couldn't someone just make a bunch of GET requests to the unsubscribe url for each user id and unsubscribe the entire user base?