Here Is Why You Should Be Thankful for Spiders in Your Fruit

Not this:

 A) You have been condemned by the Universe and it's going to send unexpected life-threatening situations your way until you eventually go insane.
B) Farmers are mindfully letting the spiders live in their plantation because they serve a purpose.
C) You are destined to become the crime fighting superhero Spiderman. Also your uncle's going to die.
D) Spiders live to freak people out.

While the last one is quite probable and explains a lot, it's actually B), as you already figured out.

It's not a conspiracy, it's rather a big plot hole in a (not so) well thought-out plan.

To understand the situation, we must first revisit a few basic facts, that really tie the whole image together:

•  Pesticides- substances used by agriculturists to kill and repel pests, to protect their productions.
  Here it's important to keep in mind that the human kind has been going for the easy solutions since the dawn of civilisation (and it's not working out great).
•  In recent years there is a strong movement against pesticides being used in the food industry, and it's gained a lot of followers. The people, that this depends on, are not turning a blind eye either and it's given a rise to an alternative called Integrated Pest Management .
•  Biological control is a form of IPM, or simply put- spiders eat pest insects.

With all this said, it must be clear to you already what is happening.
Farmers are putting big predator spiders into their fields to manage the population of pests, therefore increase food quality, in an environmentally-conscious way.
However, not everything follows the “What happens in Vegas, stays in Vegas” rule, and naturally spiders end up getting transported alongside the fruit into grocery shops and.. people's homes. That is the big hole in the system.

What's unfortunate is how much attention is given to the danger-factor, instead of to the story behind it.

The companies are doing their best to keep the spiders in the fields, of course, but it's hard to have it both ways. It might sound like a shrug-off, an “It is what it is” sort of reaction to people's complaints, but it's actually the better solution.

The truth is, people are getting revved up about it because a spider is something solid, something you can put your hand around (don't), and your brain automatically classifies as a danger to your well-being.

On the other hand, the infinite amount of damage done by the use of pesticides in your food is not something you consider in your everyday life, as it's not an immediate threat.
Even in a worse case scenario, these spiders can never be even half as much trouble compared to the impact these sprays have on the air, water, soil, plants, animals and humans (birth defects, genetic changes, tumours, nerve disorders..let's not go on).

On a final note, spiders are a good thing, but it's hard to see that when it's staring you in the face.