I've personally seen forms come through with dire character comments
That's the strange part I feel. The BOE letters clearly state that these construction/volunteer forms are for exemplary baptized publishers. In my congregation, the BOE has given forms only to those who qualify.
The signed consent if for additional data, such as on this form, to be stored about you.
This additional data is the subjective evaluation that the individual himself permits the elders to do regarding him when he signs the form. The individual himself permits the elders to rate him and store information on him. If he leaves the WT then he can ask the WT to erase the data on him under the Article 17, I guess.
Why would a person who doubts the WT reach to the point of filling up a Volunteer Program Application?
it is significant that S-21 data (name | DOB | baptism | phone | email | service record | "OS/anointed") is going to be held regardless of signed consent.
The Baptism date and the service record data, OS/anointed is of zero value to anyone than the WT.
The only data they will have is the name, DOB, phone/email and the address, which pretty much dozens and dozens of entities other than the WT have about me.
My view is that you are overthinking about this issue. But you are entitled to an opinion.