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/...
Furthermore, at least in Massachusetts, when you purchase property you also purchase title insurance that protects you against this. I remember very specifically, at closing, that my attorney explained that the insurance was in case someone came around with an old claim to the land.
It would be interesting to find out who and what paid out, because these scams have been going on for a bit. (There was one linked to where a property owner drove by and found a house being built on their land.)