Tracking dots (or lines, or barcodes, or whatever other technique) are not unique to laser printers. They are also not the only surveillance technology built in

Tracking dots (or lines, or barcodes, or whatever other technique) are not unique to laser printers. They are also not the only surveillance technology built into printers. There's digital watermarking, steganography, CDS, telemetry, and even logs kept in local memory/storage.