It would be useful to be able to copy and paste images directly into the discussion forums. In heavily locked down IT environments, such as at my current client site, it's not possible to use the insert/edit image button. The only way I can load an image to a discussion is to copy into a word doc and attach it.
The Tableau forums allow a simple copy/paste of an image into their forums, implementing that same functionality into the Alteryx forum would be a big help. Even for users who are able to load images it would save them time, instead of having to save an image then upload, ctrl-c ctrl-v is much quicker.