I can certainly say no to your final question. I have two accounts here but have never had the desire to abuse server rules. I enjoy playing the game the classic way and with that being said, no dual boxing.
I do have a data cap of 4g LTE speeds but once that is exceeded (2.5 gb) I drop down to 3g which is still enough to game with.
speedtest.net -
http://www.speedtest.net/result/2507321828.png
Thanks for the insight