Ive had to tell at least one of my clients the proper way to take money out of their business accounts without running afoul of regulations for this very reason. Also, people having multiple entities need to be careful because transferring money back and forth can trigger an audit or examination. During my accounting internship, my then boss told me a story of a client who got examined because of how much and how often money was transferred between two separate business entities. From what I was told, the client was suspected of money laundering and the examination was rather thorough because of that. In the end, though, it was discovered there was no laundering and simply sloppy money management involving the client and both entities.
RG has had multiple entities, including at least one PAC, documented in his main thread. With as tight as his personal finances can be, I can easily see him moving money back and forth to pay various expenses - business and personal both. If his financial skills are as good as as his law skills, it would be unsurprising if his books were an absolute mess.