Where do the bugs that end up in old pasta come from? Do they hatch in there? When I eat pasta am I really eating bug eggs? 
This has never happened to me. I occasionally have old pasta around, but usually I go through my stock in a couple months. I’ve never even heard of anyone getting bugs in pasta.
I’m pretty sure the eggs get laid there not long before hatching. I doubt there are significant amounts of bug eggs from the beginning.
But if there are, hey, they taste good with Ragu!
Are these those teensy little straw-colored things the size of mites? I think the bugs are lurking in your kitchen and are only noticeable when they find their way into the pasta. (They attack dried beans and lentils, too.) I’ve never found them in pasta that has been kept in an airtight container like an apothecary jar.
This just happened to me last night!
I had one BAG of pasta that was from one manufacturer, not sealed, and some weeks old, and another BOX of the same variety of pasta from another manufacturer that was not sealed for roughly the same amount of time, more or less. Boiled water, salt and oil, dumped in contents from the * BOX *. Hmmm, not enough, but no bugs floating in the water. Dumped in contents from the * BAG * and Ewwww!
Little black six legged things, but not roaches, these were more arrowhead shaped invaders about 2mm long, doing there version of the titanic aftermath in my pot, (´cept the water was way warmer then the north sea). Since the 2 containers had been open for roughly the same amount of time, sitting next to each other, they had equal chances of being infected, but were not. Also the stuff in the box was of superior quality/price to the stuff in the bag, this leads me to think that the bugs came from the factory and I was getting a little extra protein for my money. Yecch!
I’ve never had this happen with pasta, but I’ve had it happen with flour. In that case, yes, you eat the eggs.
From my understanding, the bugs are laid on the wheat and the grinding is not done finely enough to crush the eggs. So, it comes from the wheat fields.
I’ve never had bugs in pasta (and I’ve had old pasta) but my mom always told me that there were bug eggs in flour that will hatch if left for too long.
And this is the reason why all food in your pantry that is in paper or cardboard (and you don’t go through very quickly, like your favorite cereal), should be transferred to airtight hard plastic or glass or metal containers… pasta, flour, rice, etc…
Peace.
Painfully obvious hints from Heloise.
I store such things in the freezer, to kill the little buggers.