Chip/Tom,
On most any other course, I'd likely answer in the negative.
It's just that like all uniquely great courses, Merion has a sense of "place".
In this case, it's interwoven and blended uniquely into a pocket of the Philadelphia suburbs so tightly that the homes and roadways adjoining the property along the perimeters are almost part and parcel of the course themselves, much like the town of St. Andrews is indistinguishable from the golf experience.
You can't stand on the second tee and not feel the presence of a busy roadway encroaching just one slight push or slice away on the right, any more than you can stand on the 7th tee and not instinctively and visually realize that if you just push your tee shot slightly and cozy it up into that nook near the fence and homes on the right that you'll be shooting down the big length of that green for your second, but if you overdo it slightly....
How can one stand on the 15th tee and again not see the road snaking in on the left, just where you'd like to be to avoid the direct line, oblique approach over the fronting right bunker?
Probably unlike most any course I've ever played, the unnatural elements surrounding the Merion course are part and parcel of the golf.
However, unlike Tom's opinion, I'd be surprised in any conditions to see a ball cascade off the mound left of 14 and reach OB. And even if it would, the fact that the shot needed artificial assistance to be penalized would discount it as inconsistent with the overall strangely seamless integration between golf and typical upscale Main-Line suburban life that is so much a part of the Merion experience.
Still, Tom certainly knows the course much better than I do, so if he says a ball could deflect OB off of that mound, it must be based on direct knowledge.