It's a petition. It's primary function is to serve as a list of names. Your concern is that it might later be used for retaliation, which has always been true

It's a petition. It's primary function is to serve as a list of names. Your concern is that it might later be used for retaliation, which has always been true throughout the history of man. The solution is to ensure that the government cannot retaliate against it's own citizens with impunity.