From the CNN.com article with the latest updates on the Aqua Teen Hunger Force promo that went awry:
[...] In Portland, police Sgt. Brian Schmautz said officers had no plans to remove any of the signs, so long as they weren’t on municipal property. Nor had officers been dispatched in any kind of bomb scare related to the devices.
“At this point we wouldn’t even begin an investigation, because there’s no reason to believe a crime has occurred,” Schmautz said. [...]
It appears I live in one of the saner parts of this thoroughly insane country. Thank God.