You can see comments which people have submitted to USPTO’s proposed penalty for non-DOCX filings.
Unfortunately the way the Notice of Proposed Rulemaking is written, it mixes together many different issues. So it’s not easy to pick out the comments that particularly address the proposed penalty for non-DOCX filings.
Here are some comments that address this issue:

Okay, loyal readers, who among us knows the name of this fitting? I first encountered these fittings a very long time ago, when I was about ten or eleven years old. If you know what this kind of fitting is called, please post a comment below.
There are three intellectual property classification systems named by the city in which the system was established. Can you name the three systems? 


I still vividly recall the first time a hotel annoyed me by charging a package fee. It was a Hyatt hotel in downtown Chicago; I was attending a professional meeting about twenty years ago. I had arranged for some courier package to be sent to me, and I had to pay a $15 ransom to get the package.