[theBlake]

This is a cross post because there is another Photobucket thread, but I assume most people hear are using phones to take their photos initially

I use Google photos, just take the picture with my phone, and its auto synched to Google
Then using the Web, go to Google Photos, share the photo, then open the shared link, and then copy image address (right click). Its a super long URL without a file extension, but simply add "?.jpg" to the end of the URL after 'no' so that it works in forum posts.

Also right at the end of the URL is the photo dimensions in pixels, you can just resize it you wish. I just take a rough guess at 50% a side, and it seems to work out alright, or just use a standard 640:480

Of course thats a few steps, but so is every other method too, but the best part is you have full control over removing the photo if you want.