On PC? I hardly misclick anything on PC... It is pretty hard to misclick on PC.
Surely that on mobile phone misclicks are much more often then on PC - at mobile phone I misclick something practically each time I log in from mobile phone (mostly harmless like wrong letter or open "Messages" instead "Information" or something like that)... but last couple of days I had two really bad misclicks that combined costed my character his monthly income.
But in 10 years, how long I am playing BM, it happened to me at least dozen of times that I misclicked on PC as well and one of those misclicks costed me unique sword.