Only screw up I've ever been completely ashamed of was back when I was WHM only and I was pots in the Temple of Uggalepih for BLM scrolls and probably bees for honey/hivechips because I was a cheap taru and they were worth decent gil. You know that era when WHM learns hexastrike with decent ws gear and thinks they are a real DD while we are on weak to blunt mobs!
As I'm resting up my mp for another fight I notice a THF wipe to this Tonberry NM at ~50% left on it's HP. Another THF watching grabs it, dies eventually and RR's up to just die again.
I decide what the hell, I'll try! I got RR up, it's only at ~5% now, what's the worst that could happen. I claimed the NM, build up TP, 100% > hexa strike and kill it. It drops some gil which I was thinking "all right 10k gil from this nm! I can almost afford blessed trousers now with these beehive chips!" Hey look, it also dropped this dagger for THF but I don't play THF. Maybe I can sell it. Later I get back to town, put my beechips/honey up on the AH. I looked for the dagger but didn't see it in my inventory. Checked my logs and it shows it being dropped because my inventory was full. I'm pretty sure i only had like 40-50 slots then too ... like I said I was a cheap taru.
Anyone remember back around ~2004/2005 when RMT sold gil for like $2 per million around Christmas holidays? That drove up the price of everything to stupid levels. I do.
You know what else I remember about that time? That a Thief's Knife was worth ~200M and I left it rot in a full loot pool inventory so I could hoard my beehive chips and blm scrolls. I was so mad that I rage quit that night, sold everything in my inventory to the nearest NPC, uninstalled my game, and broke my install discs.
Next month I noticed my monthly fee came out again (I never canceled my account obviously) but now I couldn't install POL to turn it off because I broke the disc. I had to buy another game to reinstall it, just to deactivate my POL ID. Well ... I reinstalled it and then continued to play for another 5 years.
TLDR-- Dumb taru drops Thief's Knife and hoards beehive chips instead!