If you would like to open (what we refer to as) a 'Themed Image' thread for people to post their airplane/airport images, that would be perfectly acceptable. You can do that. Many people here personally host those types of thread.
What you did was dump eight images into a single post - did not discuss anything - did not ask for a critique - did not invite anyone else to participate. That is not acceptable, and that is why you were referred to the other thread.
By opening a Themed Image thread, you are responsible to be the host. We expect you to manage your thread and it's participants. If you have an airplane thread, for example, and someone posts an image of a car, well, that is when you need to advise them of the premise of the thread.
I hope that makes sense.