It won't stop everyone but any realtor doing due diligence will likely see it. If is lasts long enough, it will show up on Google street view as well.
The problem is that a 4x8 plywood sign will weather very fast in New England weather. You're better off following the article's suggestion of flagging the property with the court.
BTW: When these scams happen, you can sue for the irreplaceable value of trees removed, especially if you planned on keeping the lot wooded: https://law.justia.com/cases/massachusetts/court-of-appeals/...
I live in Rochester, NY. Our weather is no better or worse if you are a sheet of plywood outside 24/7. It will last years.