hehe.. I lost a lot of money trying to take advantage of players on tilt in PLO. Its tough. Especially a good, TAG player on tilt. I tried opening my own range up to abysmal results. I would target them and go out of my way to play extra pots with them figuring they would steam off some money. And sometimes it would work, but it would take me out of my game and more often than not I would run into another player playing sniper and get stacked. I have since learned to just be patient and play more normal game. Perhaps calling down in position and c/calling oop a bit wider if you are HU with the tilter. They may be more apt to 3 barrel, so you may have to call with non-nut straights and flushes and two pairs.
But don't start calling down with overpairs in spots you would not normally. A TAG on tilt is more likely to overplay AAxx and you are just paying that off. It cost me thousands to learn this.