While I agree that there are lovely landscape photos with no plants identified, those photos will likely be seen by very few people. They will appear on the day they are submitted, quickly replaced by others that push them off the screen. After that, they MAY appear if a person has chosen to have a 'random landscape photo' show up on their home page, or if someone actively seeks out landscape photos by a specific member. I don't know how else they would ever appear (?)
Landscape photos that have been tagged, on the other hand, will show up in the main database under each identified plant - for a much broader exposure, and also serve a useful purpose of showing folks who may be researching a specific plant how it can look in an actual landscape.
I guess I don't personally care if folks choose to post photos that will quickly fade into obscurity, just seems like rather a waste. To me, the database is both a resource and learning tool. If a person submits a nicely composed photograph of a garden showcasing several plants, and for whatever reason does not know the identity of any of the plants, why not post it first on the Plant ID forum (which almost always generates active discussion that results in at least a genus/species ID if not a cultivar-specific one), then tag appropriately before submitting as a landscape photo. Yes, that does take a bit of time, but that's kind of how I see this crowd-sourced database grow in a more useful fashion.
My two cents.
