When I was a kid, my stepdad, who was an avid hunter, ran over a big rattlesnake with his old international scout 4x4......... by accident, mind you...... Rather than waste it he brought it home and skinned it out, and my mom breaded / deep fried it. Kinda weird tasting, like between chicken and fish

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Anyhow, lots of snake lovers say everyone should be educated on every single snake rather than killing one, not sure who's right or wrong, but when you dig up a snake accidentally, I doubt there's much time to consider moral rights / wrongs of killing it before it whacks ya.
Being a metal detectorist doe not automatically mean you must study every plant, animal, etc you may encounter in the field. We should tread lightly and show respect, yes, but being in the hobby doesn't mean I or anyone else should conform to anyone elses beliefs on politics, ecology, eating / not eating meat, etc.
This thread seems to have degenerated into people trying to impose their views on everyone else.