i just happend to look inside scenery-gfx folder, and i saw those porn pictures inside...
dont know why they are needed in soldat, who puts them in server so we download it..but as a religious man i dont want them in my pc.
Mapmakers can use them like any other scenery, I also stumbled across them in climb maps.
Even if they are not visible, they can be included into the map scenery list and downloaded that way.
It's not possible to block any kind of these pictures automatically, but you can savely delete all of them (don't forget to empty the recycle bin, after)
As long as you don't need to re-download the map file itself, the pictures won't be redownloaded by playing that map, they will just show up as missing
If you download a new map however which uses that scenery, you'll have it on your computer again