Is there no option to disable it? Seems you should take it up with the dev, and tell him we don't allow signature content outside the signature area, which is going to cause issues with his userbase.
Now that you mention it, I think I found the 'advertised from' checkbox. If that is indeed the case, and I need another post to verify since the search option is disabled and I can't access this thread without a bump, then the app became a bit cooler. It wasn't an obvious selection though when considering signature content. Perhaps I am slow...
If an official app is forthcoming, I would love that. Aside from some basic issues(search is basic and necessary, in my opinion, when trying to find threads already responded to; and a few other annoyances) this app keeps me informed when I am away from from my computer...
So please tell me there is another app coming!!
Edit - Tested on another thread and the disable works (Will delete them in the morning because they aren't contextual to the thread). Egg on my face. That said, the app does crash often and search is disabled. So it's cool but could use improvement.