What kind of varmints? Why not just shoot them if they are a dangerous nuisance? Your method causes animals much fear and passibly injury.
Never cared for the phrase ‘you do you...’ but
if it floats your boat, any port in a storm eh?
Basically, I feel it is much more humane to give them deep
sleep, but if you are a cracker jack shot by all means
‘shoot away’ but also louder, draws unwanted attention,
law of unintended consequences, etc.
Mostly for me living in suburbia can keep it on a
need to know basis.