Insects weren't always small. Check out the variety of bugs that would freak people out if they still lived today in this video uploaded by Mega Top Tens on November 23, 2015.
I believe the protocols on bug spray would be very different if these critters were around today. Instead of cans, there would be cannons. And, given that certain individuals enjoy having bugs for pets, we would probably see some of these being walked down the street on leashes.
More cool animal videos can be found here!