I have a 8 year old daughter that he likes to chomp down on. We taught her and her brother about bite inhibition and to yelp when he bites. He will stop for us but for my daughter he doesn't.
When I have him by the scruff I am supporting his body too. I'm not letting him hang there. If you pull on that part of him gently he lets out a whelp like he's being hurt.
As for being held like a baby. When I need to pick him up for any reason he likes to wiggle away and I don't want to drop him so to prevent it I hold him like a baby.