An once of prevention as they say! I always carry gloves regardless of some stupid rule by some government wonk! Just hide them in a pocket until needed and don't make a big deal of it! I have learned it does no good to ask, better to be forgiven and warned! Some of us just don't learn! LOL Having said that as long as you have demonstrated to the DM you ability to stay off their coral they won't care, just don't flaunt them to the DM and the other divers by waving as you pass another boat! But with Fire Corals ability to grow on mooring lines as well as Hydroids it is better to have the gloves as a safety issue. The best thing to say if challenged is you have an allergy! Who's to say?