I have been tagged 4 times by snakes.

1st - female snow corn. Was feeding in the enclosure. Used fingers to dangle f/t mouse (mouse was room temp). She felt that my warm fingers were a better meal and tagged my finger. I quickly learned to use feeding tongs.

2nd - handled a baby pastel male who was in shed. Should not have handled him while he was in shed.

3rd - reached hand into a baby carpet python's enclosure. He tagged me.

4th - feeding pastel male in enclosure(f/t mouse). He struck the mouse but uncoiled. He sometimes will not eat a feeder unless he is coiled around it so I went to pick it back up with the feeding tongs and he tagged my finger.

Now these are all due to keeper error, not the fact I feed in the enclosure. Usually if a snake strikes at me it is because my hand is warmer than their feeder (I don't heat f/t feeders, just thaw to room temp) or I am not using feeding tongs. I normally have no issues with feeding in the enclosure and experience little to no aggression when I reach in to handle them.