It seems people use it as an excuse to share their pictures, which is only natural humans like to share, but it isn’t what the forum is for(I think?)
Maybe I am being hypocritical since I have previously posted in the blue topic, but I think I showed more restrain.
Sampling the average blues in my post post:
I think I would call these all blue
I might also be biased against mainly picture sharing topics as my internet is very slow and I have to wait for each one to load?