What are some the more idiotic and stupid mistakes that you know you shouldn't have made but did anyway. Yes this includes other none gambling stuff like sending btc to the wrong address. I'm interested to find out the stupid things other people do. 
there is a lot of nonsense in our world and especially in the crypto-currency...many confuse wallets and transferred into the hands of fraudsters and then can not return them) a lot of problems with this....defend himself