Let everybody learn from your mistakes. Stupid? A great learning opportunity, I say
Please add your biggest f*ck-ups in this thread!
Mine:
1. Buying a 250k Leg. rapier, then clicking "Sell All" in Equipment Store. Had to quickly buy it back - now untradable
2. Buying several lv 400+ items in Bazaar at lv 10, then finding out I couldn't use them at my level
3. Getting killed in the 99th round of a 100 round Arena Challenge