Sometimes i see an image that says "this image has been moved or deleted", so the original image isn't available anymore.
That's how i figured out that an image can be replaced without changing the URL.
This means, you can post the image on several boards and change the content/message of this image
from the outside.
You can even link these images and redirect it later to a new URL.
My idea is an website where you can make TEXT to IMAGE or combine TEXT and IMAGE.
You can create a post and copy-&-past the script on countless message boards and change it afterwards.
This site should offer the most useful icons/images/frames(for the text), so that the user doens't really need to upload own images.
You could add to the normal post for example 10 images below each other (all 1x1 pixel, invisible, and every second image is linked)
Post it somewhere, but you won't see these images yet because they are so small.
Now you want to add some additional informations, You replace the 1x1 images with real ones.
So when an user on a message board reloads the page he will see now the new images/information.
Even Links can change and redirect to a new site
There are some services called URL-Shortener, who shorten long URLs.
some even offer to change the URL of the redirected site.
A musician creates a newsletter, the links are posted on several (fan)boards.
The artist announces the he plans to tour and a linked icon for tickets is to see.
A week later the musician changes the images and he announces that he has a new song.
The ticket-icon is replaced by the buy-icon and the link leads to the site where you can buy the song
You could even use unused/empty images for ads.
so what do you think about this idea?