It's a waste of space in the datablock group. Too many datablocks disables other datablocks until the limit isn't reached. (It disables random datablocks I believe)
You should probably figure out how it actually works before you go and post this kind of nonsense.
It's not random. 1 datablock isn't really all that much, compared to other things especially.
Though there is little-to-no reason to have a datablock just for an image. Prints don't do this and they still download. Use prints.