Of course\, it would also be possible for concerned individuals to call the number anonymously and tell the unlovely Alliance exactly what they think of them compiling (probably illegally) lists of young people engaged in a lawful protest. After all, the Alliance's stated aim is to object to illegal means of pursuing democracy, and there is nothing illegal about the proposed action. But you wouldn't do anything so naughty, now would you?
Courtesy of Hong Wrong, which has more on this.
It has only just occurred to me that Alliance head Robert Chow may have ambitions to become the next Chief Executive. No one could suck up to Beijing so assiduously without hoping for something in return. From positioning his previous organisation, the dishonestly-titled Silent Majority, as some sort of independent voice of the people, he has gone to acting like a Red Guard during the Cultural Revolution in a matter of weeks. Creepy.