They are generally harmful. Insects such as mosquitos are vectors and they spread many dangerous diseases.
maybe get rid of some nasty insects that try to hurt our environment!
Silver bullets
yes
Bubble wrap
no they dont. they scrape open skin and lap up blood
yes they can but it really wont do anything but hurt them .
yes
So their preydators will get hurt
A vampire that doesn't hunt humans and trys not to hurt them either.
How they hate garlic ,do their bites hurt
It won't because they don't exist.
if you mean plant.. its garlic.