As long as your target show & tell doesn't resemble Jamflickers. If you're just showing an occasional wheatie, clad, etc.... Ok. Then you can come north of Santa Barbara.
But if you start to show any silver-hoover-vac skills like Jamflicker: Then we don't want you up here. Then our threat would be the same to you: Guido would be waiting for you at the border. And ... as they say : Accidents *do* happen.