re: Can a person have his baptism nullified if he was too young when baptised?
What would be the point? Either one wants to be a witness or not. Have you heard of those religious ceremonies where couples call on God to bless their divorce? Or like those who say "we got divorced but now we are the best of friends".
Is all of this stuff wanting to look good in the eyes of others? A common human failing, who of us can say we never succumbed to it?
Oh heck, here we go again - better to be straightforward.