Wasps can damage soft fruit, but ripening apples and pears won’t usually be affected unless first damaged by birds or caterpillars.
They can be a nuisance in houses when food is being cooked or eaten, especially where sweet foodstuffs are being prepared.
Wasps can also be a serious pest to bees. In Spring worker wasps will attack and carry off foraging worker bees, and later in the year they will take honey bee grubs, and pupae.
They are an absolute pest for humans when trying to dine or socialise outdoors.
Wasps will gnaw into wooden furniture, wooden beams, and anything they can get building materials from.
Having said all this they are still beneficial creatures (see ‘Good things wasps do’ above) and don’t kill wasps just make them go away instead.