At webzin Alternation.pl you need the user account only in order to add links, events or posts on the forum.
The whole service is characterized by open structure – you needn't log in to see any information.
So if you start an account use it well.
The unused accounts are deleted from time to time.
Remember that the data you give will be given in public on the list of users.
Remember that after you have registered you may always change the data given during registration.