In another similar "regulatory" move, taxes on cigarettes have been shown to be effective for reducing smoking in "new smokers" and young adults (18 - 24) but with almost no effect in other age groups:
http://org.elon.edu/ipe/gallagher.pdf
and
http://www.cdc.gov/mmwr/preview/mmwrhtml/rr4916a1.htm
Would a similar strategy really be effective w/sugar or just add a further tax burden to 95% of us?
Can't we come up with a better system that seeing more money out the door in taxes?