as for cookies, if the user has cookies disabled on their end, ubb.threads will not work for them. no logging in or remembering what page they are interacting with.
cookies are basically a requirement for any website that you log into and interact with.
Agree 100%, cookies are a necessity if someone wants to stay logged in, but nowadays some jurisdictions want you to inform users about the obvious and have them click that they accept this.
It's easy to alter the registration page to include info on accepting cookies as part of the conditions of signing up, but maybe a
checkbox when logging in would be useful for forums with users in such countries (even if as an option for the admin to turn on/off in the CP)?