If it is his “duty” to pass on requests from his constituents, then it is also his “duty” to make sure they pass as that too represents the will of his constituents.
In other words, you can’t have it both ways. You can’t claim to be against earmarks while taking direct action you know will create earmarks.
Plus, as already stated, he votes “no” knowing full well his district will get the money anyway, which makes it a charade of the highest caliber.
Read up on the process and then get back to me. You have things mixed up.
http://www.cagw.org/site/PageServer?pagename=policy_Baseline_Budgeting
You may also want to take a gander over at Citizens Against Government Waste’s Pork page, including the infamous Pig Book.
http://www.cagw.org/site/PageServer?pagename=issues_budget
They sure don't consider Paul's pork ‘special’ and ‘not effecting the budget’. At that, he is listed as a porker along with all the others.