1. Yes that's correct, if you want to bulk age stabilise first with chemicals.
2. That is also correct. There is very little chance you will get sick with any brew unless you have poor sanitation. Mould is really the only way you can get sick. I'm not really sure on your question, if you add the honey without stabilising or pasteurising you will just get a renewed fermentation.
3. That is definitely alright, I do it with every one of my brews.