Throwing has been OP for way too long. It's a fact that it does so much damage and requires so little. You don't need any WPF to be accurrate, just like archery was like, until the WPF patch came in (where archers needed WPF to be accurrate).
This is actually a fallacy perpetuated by people who have little experience of throwing. Powerthrow increases the velocity of the projectiles you throw making it easier to hit people, but it doesnt stop the random fly off of throwing weapons that occurs if you have low wpf.
If you have no wpf, as I found out when that small patch came out after the new patch which reset the wpf on my thrower to 2, throwing weapons will fly off all over the place and still be hard to aim.
But this is an issue for pure throwers mainly. Hybrids are a different issue altogether, depending on what someone uses them for, ive seen thrower hybrids either use them for either softening up an enemy or killing a low armoured one, but you also get shield throwers who just hide behind armour and their shields and spam like crazy till it kills someone and once they run out they often pull out a melee weapon and fight as normal.
Someone who uses just throwing could never get away with that. As for those claiming to see thrower/hybrids at the top of the score board, as adrian did, you have to actually look at how the person got those kills, chances are the hybrid got one or two kills with throwing, unless he's carrying those silly lances, and the rest with his melee weapon. In this sense a hybrid uses throwing the same way most use crossbows, as something to get some kills with or wound the enemy, but not always as the primary power of his/her build.
Personally I virtually never see a pure thrower at the top of the scoreboard and if someone does make it there, they dont stop there very long.
The only throwing weapons I have issue with are lances and heavy axes, the axes in particular are incredibly effective and one of the more accurate heavy tier throwing weapons.
The rest are not as bad as people make them out to be. My ratigan is a 1 handed no shielder and I have less issues with throwing than with pretty much anything else.