To be clear, the customer doesn't violate Regulation D; the bank does when it allows a customer to make excessive transfers or withdrawals from the savings account or MMDA, and still reports the account as a savings account under the regulation.
If a bank's monitoring program is effective, it will eventually identify the customer who makes the "third strike" with the new account, and, if the customer hops to yet another office to repeat those actions, he or she will be identified again.
In my experience in times when interest rates were high enough to make savings and MMD accounts more interesting than NOW accounts (before the days of interest-bearing DDAs), in a bank with over a dozen offices, the number of customers on our "Reg D Problems" was small enough that repeats were pretty easy to spot.