There's a German site for trainspotters and railway-freaks, which includes also a kind of IMTrainDb chapter.

But they are terrible nerds, masses of often hardcore Asperger-candidates, much freakier than us.

I was warned before, to place a comment there, especially with a photo
- but I didn't got problems, because my motif was a kind of Holy Grail in the trainspotter world:
the narrow-gauge railway in Hamhung/Northkorea