I don't understand why the OP seems so concerned about some mixer services being promoted via signature campaigns. Laws differ from country to country, so this discussion will not be finish and come to a conclusion unless the government issues an official regulation on this issue.
From my understanding it seems to me that bitcoin existence is different from the bitcointalk forum and without the existence of bitcointalk forum bitcoin will continue existing, what's your take on this.
Yes definitely Bitcoin is not dependent on Bitcointalk but Bitcointalk is dependent on Bitcoin, this is why this forum is called Bitcointalk.
Bitcointalk is the best forum for the community to discuss anything, not only about price speculation and investment strategies - but also about project development and more.