I don't know how to keep up with doing it on forums anymore.
Flickr's code works well and resizes ok (unless you're Avis)
The majority of people's regular photos are on FB and instagram.
On another forum, it easy to post grammed photos to their board. You copy the img code (using this right click extension) and then post with the IMG button that adds the same tag here but it lets you change the size:
Note that f you resort to linking to FB photos, their URL changes eventually. Even Daniel's Feb 20th 2017 shakedown thread has no photos in it now. Should we nuke threads like that since it's cricket content?
I feel like there has to be some easy solution to this by now.