Here’s anither way to look at, in absence of an official Church stance, which I don’t know about...can one accidentally reject God? Can one accidentally worship Satan? Can one accidentally go to hell? No, no and no. Souls who go to hell do so after a life of chances to choose God, because He is all-merciful, so those who accept the mark of the beast will do so knowingly because such a mark will signify a rejection of God.
Does that mean that all who take the mark will be damned? Does that mean there won’t be those who repent and change their mind? I don’t know. But it’s logical to assume that the acceptance of the mark will be a public profession of Satan, who no one can say they chose accidentally. That’s my opinion...