This is more about a bad OCR than about paint splatters. They also tried multiple OCR settings until one worked. If you used more accurate OCR this would be very different.
More accurate OCR would recognise the images have no text
$ touch temp.pl; perl temp.pl; echo "exit code $?" exit code 0
$ echo "stitch & shutter" > temp.pl; perl temp.pl; echo "exit code $?" exit code 0
More accurate OCR would recognise the images have no text
which is a valid perl program. And that one image with the watermark "stitch & shutter" ? Also valid perl.