I'm going on a soda strike for 2 weeks. Anyone wanna join? :D
It is bad for you to quit drinking soda after usually drinking it a lot abruptly, you'll likely to go through headaches (I know this from personal experience).
After realizing that it would be much better for me to not drink soda, I stopped abruptly and went through many strong headaches, and got back on it but only drinking one like every few days. Then I just stopped and I don't regret it.
Now I just drink Dr Pepper sometimes on the weekends or at friends house, I haven't had a headache in forever, so awesome :D.
Just slow down your intake and then quit completely. Water is so delicious :D.