Carrying Israeli style (empty chamber, loaded mag) is a bad idea for one big reason. If your weak hand is immobilized it will be impossible to rack the slide one handed.
I have thought many times that it was unnecessary to carry in certain places, but I do anyway. Often, places we perceive as the safest are actually the most dangerous because our guard is down. The only times I don't carry are where it is illegal or if I intend to consume alcohol. That's it.
Is your inhibition to carrying one in the the chamber due to the perceived lack of safety on the Glock? I can assure you they are very safe, however you may be best served with a model with a decocker or safety.
'Merica: Back to back World War Champs