Over the last few weeks I have seen numerous threads on how to remove and/or restrict flying in WoW. Flying was added back in TBC. You really think that Blizz is gonna remove or restrict it now? It's on par w/ your Internet Provider saying they are going back to 56k Dial Up service!, that would piss you off wouldn't it?. It won't happen! It is a pipe dream!
I understand that these arguments for it are in hopes of the return to World PVP. If you didn't already know World PVP is dead! It is gone from WoW and to try to force it's return is stupid. If Blizz removed flying I would be willing to bet a hefty sum, that not only would it not resurrect World PVP but would further diminish their subscriber base.
Flying is here to stay as it is!, if you dont like it then you may want to start looking to other games to keep your ass firmly planted on the ground.
It's not dead, cross-realm zones brought back a good portion of it, not to mention it's still out there if they're not lazy enough to actually get out of the city everyone once and awhile. Hell Elwynn Forest gets raided and only 2-3 of 20 level 90's actually got the balls to attempt WPvP and try to get the one lonely panda monk. Flying is staying, it didn't kill anything. Playerbase did most of the killing.