Forum itself needs to enable image uploading feature so that we will not depend on any third party before we can upload image and also that there will not be any issue like thus that we should fix anything.
I think this is a valid suggestion as, it would in one move eliminate all the hassle of having to go over to an image hosting site, uploading the image after adjusting it to a proper size although that could be done on the forum, copying the right link and placing it in the other for which we would want it.
A script could be put in place to perform this function just as it is with them avatar updates. Grant access to your device and select just the right image, the codes be there to allow for adjustment of size. It would be such improvement and we are sure it ain't getting scrapped with time.