I read that article (or a very similar one) a day or two ago. I haven't had any issues crossing into Maine a few times this year. Other than occasionally getting a border guard with a pissy attitude, most have been pretty good. Got one jerk while crossing from Manitoba into Minnesota in June who was looking for a reason to turn me away. (Seemed to be an individual ***** rather than a policy thing.)
Anyway, thankfully no major problems although I try to be pretty careful with what I say and what I have with me.