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/...
https://massrealestatelawblog.com/tag/title-theft-concord-ma...
TLDR: The real property owner contacted the town to block the building permit, and then contacted the other people involved in the sale, the documents provided by the scam artist were obviously foraged, but the sale still went through and construction started.
The other major difference between this one and the other link I posted is that the owner was very likely going to build a home on the property when they retired; unlike the other link that I posted where the property was most likely an investment and going to be sold.