Haven't read full thread.
My friend has had MASSIVE issues with her pratt of an ex, all because he's on the BC and has baby's last name.
They were together couple of years, madly in love, fell pregnant. He started to change during her pregnancy and like you gave her shit about her past. Btw, he'd impregnated another woman right before he met my friend and never told her for months, so he was hardly one to talk!!!
Anyway, baby arrives, he continues being a prick. They eventually split up. Baby must have been about a year old.
He continues to have contact as local, but always when convenient to HIM. He'd get really funny if she wanted a girls night out and would be purposefully difficult in babysitting so she often had to hide the fact if she wanted a night out with friends.
He was seeing various girls. When he heard she had met someone he would purposefully turn his phone off when he had the baby. So it would be hours past the agreed time for the baby to be dropped back and she couldn't get a hold of him! Police wouldn't do anything other than check the baby was ok. As long as the child is in no harm and with their dad who has parental responsibility as is on the BC, the police will NOT remove the child and bring them back to the mum.
He'd constantly threaten that he'd keep the baby and she'd have to go to court to get him back.
She wanted to go on a family holiday abroad. She was smart enough to not tell him this, just float the 'idea' past him, as the airline policy was you have to have a signed letter from any person with parental responsibility that it's authorised by them to take the child out of the country. He loved knowing he could use that as a way to control her! In the end she went and didn't tell him and luckily wasn't asked for said letter, but she was SO stressed leading up to that holiday, worrying about how it was more obvious as she had a different surname to the baby etc. It should have been a time for excitement.
He's threatened to go for full custody and make out she's a shit mum as she suffered pnd. He's said he'd definitely get 50/50 care at least from the courts if he requested it.
On and on and on.
She was extremely happy with him at one point. It's settled down a lot now few years on, but my god did he make her life hell if he felt she was going against him, didn't agree with her dating etc etc.
Another friend, long term relationship, split when baby was 6 months old. She years later when kid started school wanted their surnames the same as her child wanted it. The dad eventually did agree to a change of surname, but she had to jump through hoops to get it. Despite him barely ever seeing his son.
Do you know they can even get a say in all medical care and things like what school your child can attend?
Neither friend was married. Neither friend would have ever said their ex was capable of such behaviour, before they started demonstrating it.
My DH changed his name to his mums surname as his dad never bothered with him. He wanted the surname of the person who raised him.
Not having tour ex on the BC is not irreversible - you can ammend that easily even changing surnames if you wish.
But if you do it automatically you can't change anything without his PERMISSION AND SIGNED CONSENT!
PLEASE give it a year or two to see what kind of parent he becomes, but just as importantly, what kind of CO-Parent, as that's the part that could become strained and you don't want him having automatic patental rights without any of the hard graft of actually raising the child.