Top 10 Deadliest Snakes Not To Mess With br For this installment, we count down deadly snakes with a nasty tendency to strike fear into man. Due to many countries not keeping accurate records of snake related fatalities and conflicting websites on how potent venom is in certain species, we were unable to compile a list of the "most deadly" or "most venomous" snakes - so, here is our pick of deadly snakes we wouldn't want to mess with.