I have taught of this seriously and I began to have a biased concern to bitcointalk if any signatures campaigns in bitcointalk can affects the existence of bitcointalk if they commit a crime that leads to government investigations.
Bitcointalk is a public forum where any user can create a topic and any user can manage a campaign. here the forum does not block anything or boost any campaign to get more publicity. so the forum will not be responsible for any illegal activities and will not have any effect on the forum. there are DT members, they give red tag and red flag on any account where illegal activity will be attempted. which means that the owner of that account is a criminal. Forums don't do much more than that. because this is not a company base and the forum is not here to do any business. hence the forum shall not be responsible in any way for any legal or illegal activities