It's simple, actually:
1. Nothing is free (as in beer)
2. Usually, items that are perceived as free (highways, the Internet, Welfare, Medicare, public safety services, etc.) are paid for by the government
3. The U.S. government gets its funding from its citizens--that is you and me
4. I indirectly (through taxes or through "add-on" cost-recovery fees from corporations) do not want to pay for someone else's Internet service.
If someone wants a faster pipe (or improved routing), that's fine. They can pay for that pipe. But I don't want to pay for their faster pipe. Also, with net neutrality, there's no incentive to improve delivery. If I'm Sprint, Verizon, or AT&T, why would I improve my service? There's no financial incentive. With Net Neutrality, I can't charge more for it. The Internet is not free (as in beer). It's no more free than making a phone call or getting cable TV.
Uncle Sam may have built Arpanet but the communications firms of this country build the modern-day Internet (at least within the U.S.). If I build a building, I should have a right to sell condos in that building for whatever I want. If the market for condos supports what I'm charging, that's great. The government should not be allowed to step in and say, "oh, BTW, every one of those condos has to be priced exactly the same...oh, and they can't exceed this ceiling". That's BS. I made an investment in my building and expect to realize a return on that investment. Otherwise, in the future, I will choose not to build that building and as a result, someone might not have a place to live. (as an extreme example)
This country was built on capitalism and self-reliance. We've grown into a group of complacent, handout-seeking, egalitarians. Save me! Save me! It has to stop. The government's role in this country should be to maintain individual rights, provide law and order, and maintain property rights. Otherwise, the government controls or has a hand in too much of our daily lives. The framers of our constitution never intended Uncle Sam to serve as a bedside nurse--they intended Uncle Sam to provide an environment of freedom and opportunity with a few rules such that its citizens could create and provide for themselves.
Let capitalism and economics do their thing. They usually work things out. Freedom isn't free.
Update 01/23/2007: Several of the founders weigh in against Net Neutrality.