Not to threadcrap, as I think the petition is admirable, but if I can leverage the fact that I am in a contract to retain my unlimited data, I'll do it. If everyone suddenly had no contract and was paying full price for their device, I think it would be much easier for Verizon to find a way to end unlimited grandfathered data.
Of course, many people don't have this problem, since VZW hasn't offered Unlimited Data for almost 2 years. However, for those that have it, it is truly the best product out there, since AT&T throttles and Sprint and TMobile have inferior networks. There is always a chance i would keep them without unlimited data, but there is an even greater chance that I would at least take a look at other carriers.
The most data I've used was 20 GB a couple months ago when I was on vacation. I would never use that much on a tiered plan, so it's silly if Verizon thinks they are missing their chance to cash in if they remove my unlimited data. If they did, I would simply cut my usage and stay under 2 GB per month, as I normally do anyway.
I'm not a network engineer, but I have to wonder how much strain unlimited users are really placing on the network, since their are fewer and fewer everyday and 4G, by design, is able to handle more traffic.
Hopefully, Verizon will take the mindset that even though some customers are less profitable than others, they are still profitable. It may sound weird, but if and when Verizon gets rid of contracts, I will probably upgrade a few lines to lock myself in before the change.
Assuming I have unlimited data and can retain it, I don't view a contract as a negative since I plan to be with Big Red for the foreseeable future.