I've clicked on the 2 koban button to collect from harem so many times, it's pitiful. It's usually when I'm sleepy, so it's my fault, but there isn't any confirmation what-so-ever unless you are refilling stamina. And that's only when you run out and you click the button once more and the game asks you to refill it. Otherwise there is no confirmation for anything else. You spend the kobans as quick as you spend the in game currency.
I click the collect button as well, from time to time. I always get a "Do you want to spend x kobans?" confirmation. Granted, I did not click the "Don't show this message again" button either.
Well, just hit level 70 and 6 out of the 8 pieces of equipment are for sale for kobans in the market. I think it's time for me to quit. It's been fun, but I can't keep playing a game that does this. I just wanted to hit level 70 and see for myself.