There's a lot of fruit out there, but some are better for throwing at people than others.
3
Raspberries
You'll need a handful of these and be willing to accept collateral damage to any innocent bystanders. Excellent accuracy thanks to scattershot style. Possible messy hands for you, but totally worth it.
1
Bananas
Ripe works best for splatter potential, but the odd shape may make accuracy a challenge.
2
Apples
This will do some damage, which is not the point of throwing fruit at people. It's to leave them covered in fruit, rather than contemplating legal action.