Washington, D.C. needs to tread very, very carefully. It’d be a shame if someone got hurt. The city has single-handedly put an end to online Zyn shipments after the attorney general requested information about Philip Morris’ compliance with a city ban on flavored tobacco products. The ban includes flavored synthetic nicotine products. In reply to this implicit threat from D.C., Philip Morris is ceasing all online sales from Zyn.com until the matter is resolved. (Click HERE to sign up for Mr. Right’s weekly newsletter) This is outrageous on its face. For starters, the anti-big tobacco crusade o…