Account suspended

I am the father of an autistic child and I provide him with this account. His account was suspended apparently for buying/selling gold. He does not have a checking/saving account or any credit/debit cards. He is the only person who uses this account and he does not have access to the email account used to manage his game account. It would not be possible for him to buy or sell game items for real world currency. Here is a portion of the suspension notice.

Q u o t e:
Account Name: WOW1

Account Action: 3 hour suspension and password reset
Reason for Action: In-Game Chat Policy Violation - Advertisement and Spamming

This suspension happened because one or more characters on the account were identified exchanging, or contributing to the exchange of, in-game property (items or gold) for ""real-world"" currency. This exchange process negatively impacts the World of Warcraft game environment by detracting from the value of the in-game economy.

I reviewed his actions with him and found that he had taken a level 1 Alliance character into Orgrimar. It would appear that someone concluded that only gold sellers could take an "enemy" level 1 character into a Capital city and only for the purpose of delivering gold.

My questions: Is it a violation of rules to take low level characters into "enemy territory." ? At any time a low level character is found to be in an enemy capital city are the GM's expected to conclude that the purpose is to sell gold?