Haha liberal/conservative/left/right labels have never really fitted me quite right and are irrelevant in this case. I'm not arguing for MO's stance on junk food I'm just pointing out that you are wrong in calling her a hypocrite for eating a burger. even if she does support regulation (which I'll take your word for) she's not calling for a blanket ban on burgers and 10 year sentence for those who eat them. In fact I've only ever heard her advocating a cleaning up of diets and a good balance.
I know plenty of gun owners who support tighter gun controls - hypocrites?
Public transport advocates that own cars?
Fatties that frequent bodybuilding sites?
I even know someone in the car industry who turned down a company car as he prefers to commute by bus?!
None of these are necessarily hypocrites.