Accounts tetrisarena.ru freely available

I am writing a post to a personal blog in order to warn.
In connection with the error on tetrisarene, this error has surfaced:

When you try to login, this page is displayed:


In the file password.dat - passwords were stored in clear text. Quite a lot of passwords come to email-addresses on mail.ru, ukr.net and other “freebies”. So with a cursory view - I sent it to everyone I found with a request to change passwords to email.
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Quite a lot of people with Habr also played at Tetris Arena, so they unsubscribed here.