But that's my point. You are going to get indications from a snake like a retic as they are seemingly more aware and interactive. I certainly don't expect my boa to bite but he is not one to offer a lot of "signs". He tends to hang out in the S posture and if he wanted to bite I would not know it until afterwards. Out of the cage he is curious and relaxed. In cage, he is much harder to read IMO but has never shown defensive behavior he just stares and I always wonder.
I am just prepared which is better than being caught completely off guard when I go into his cage. I still use a hook but don't get me wrong I've only had 1 bite from him early on. It's a lot easier to know a bite is coming when they tell you it's coming. That was my point I think