What percentage of Android users do you think actually root their devices?
Two problems I see.
1. The number of people who are on this site compared to the actual number of Android device owners is probably very low. And of that number, how many just come and surf looking for the problem they are having with thier device or just gleening information on what apps to obtain.
2. The actual number of people who actually root their devices who would actually sign a petition.
Not all, will sign. Therefore, you could end up sending a petition that would show a number so small when compared to the actual number of sold units that the company might just have a good laugh.
Then when the publish a report (they probably will never publish a report of a petition), but if they do, no one who signed the petition will believe the figures given by the company anyway.
As someone else stated, if rooting was allowed, how would technical assistance handle the situation when someone called with a problem with their rooted phone? This could cause the company more problems than losing a few hundred android owners. Imagine the extreme number of scenarios there are with a stock phone, but with a rooted phone, how could technical assistance be trained to help all who call.
I can give you an example from the car industry. I have a friend who was a field service engineer for GM. If he went out to a dealer on a troubled vehicle and discovered the PCM or the BCM had been reprogrammed with an aftermarket device, he walked away. The program in the stock computers was hard enough to deal with, but having a non-authorized program caused problems he could not diagnose. He had no idea what the program was supposed to do, how it affected other areas of the vehicle, etc. So again, how does a company keep their tech people up to date with all the different roots and apps out there?
Just my thoughts....