I want to know the answer to the following question:
What is a pinning method that isn't allowed?
All the background I'm provided with is that "Even if it is noticed, it is rare for such an attempt to result in a disqualification (see below), and instead it simply results in nullification of the pin attempt, so the heel wrestler rarely has anything to lose for trying it, anyway.". Is that enough to answer the question?
Answer: no