Moreover, copyright suits should only allow actual damages + cease and desist (copying).
Thus, if the work has no proven revenue, and the copyright holder sues someone for infringement, the only remedy they will obtain from the court is an order instructing the defendant to stop the copying.
Copyright lawsuits where no actual damages can be awarded wouldn't even go before a judge necessarily. There could be a hearing and some summary decision handed down: you assert the copyright, and the defendant is served the prohibition order. If fees were awarded to the plaintiff, they would be limited to absolutely minimal amounts related to the filing of affidavits and whatnot (documented by receipts from the court registry); the system would not allow some copyright troll to act in collusion with lawyers in order to rack up legal fees to extract from defendants.