I agree with Saz,definitely take an independant party with you just as a witness to what is said and it also gives you a bit moreconfidence with someone there with you.They will throw alot of legal stuff at you to bluff you so just stick to your guns,tell them they are harmless,you are licenced,like someone said before offer an extra lock on your herp door,take the body corp to play with your snakes,basic comprimise,but don't get rid of any of your snakes,shoe them that you tried to get a peaceful solution and if they keep pushing,tell them you will seek legal advice before going any further. If you go off at them(even though they probably deserve it) it will make the situation worse. people need to learn that snakes aren't evil,Whinging old ladies are.........
That is just my opinion.Good luck