Is it considered bad form to add an idea scroll to another author's sub that isn't a list (30s, 101s, etc)?
I am sometimes tempted to add to others' subs, but I don't want to step on any toes.
Some examples of what I am talking about:
There are a number of subs which seem incomplete, yet appear to have been abandoned by the original author. For example,
The Enori hasn't been touched in over 5 years, despite questions raised in the comments.
Some subs inspire plot hooks or other minor ideas. MoonHunter's
Red Tiles, for example, could inspire a number of plot hooks based on body disposal.
Others appear to be intentionally left open-ended.
The Mask that Grins and Lies comes to mind. (Never mind, Infested went and improved it himself

)
Some subs create questions that the original author didn't think to ask. See axlerowes comments on my own
The Undead Knights of Knonii.
I like the kind of give and take I see in the Citadel. We share ideas through chat, in the forum, and through comments. I'm just curious as to why I've only seen scrolls added to lists (of course, I've only perused a small fraction of the existing content, so correct me if I'm missing something.) As an author, I encourage others to expand on my own ideas.
How does everyone else feel about this?