Yes personally I think the sig is definitely a compelling marker. Especially after the patch that caused them to not be completely random anymore. Plus the fact of time. I have had a static that I did not warp to last upwards of a week. If in fact it was active it would have had the normal 24 hour timer.
Interiors for The Waltons were filmed on Stage 26 and Stage 20 of The Warner Bros. Studio which was known during the original series as The Burbank Studios.
The exterior of the Walton house and Ike Godsey's Mercantile and Drucilla's Pond were located on the backlot just to the east of the Stages in an area known as the Jungle set. Just to the south of the Studio is a mountainous range of the Hollywood Hills that played the role of Walton's Mountain. The infamous Hollywood Sign is located on the southern side of the same range.