Too many photos? Redundancies? A few random examples:
AZURA, cruise liner, 299 pics,
CAP SAN DIEGO, museum ship, 268 pics,
IDA RAMBOW, feeder, 261 pics,
CRESTWAY, dredger, 190 pics
QUEEN ELIZABETH 2, 815 pics (!)
It is not possible to investigate this systematically.
But there is no doubt that some ships are spotted "too often", just because they are frequent visitors in ports with many active shipspotters.
The situation is a wee bit lopsided indeed.
cheers
Uwe