To answer the OP's question, I would feel 100% comfortable under the following conditions:
1) The safety is not overly easy to move to the "off" position.
2) The pistol is carried in a pocket holster that fits well and covers the trigger
3) Nothing else is carried in that pocket.
Whenever my dress does not permit me to carry my SR9c, I carry an LC9s - frequently in a pocket holster.