There's no chance of securing the necessary support. Even if a miracle happened and 2/3 of both the House and Senate supported it, there's no way in hell 3/4 of the state legislatures would support it. Perhaps you're not fully aware of the cross-party animosity that exists in the United States. And an online security amendment would be highly contested, with push back from every privacy group, and every civil rights group in the country. It's just reasonable to be believe 3/4 of the states would go along with this. It's absurd proposition, really. Amendments aren't some easy thing that can happen with a smile and an "elevator speech". And for good reason. An amendment about a topic as controversial as online safety is not something that has a reasonable chance of passing Congress, let alone 3/4 of the states. You'd have a better chance of winning Powerball (odds 273,000,000:1) than getting an amendment passed.