If it says you must report any --single-- withdrawal larger than $10k, then you are complying with it if you don't report:
A single withdrawal $5k;
3 withdrawal of $9k;
Yearly withdrawals of groceries;
Like said in another comment, you could easily ask to report any --total-- withdrawal larger than $10k within a time frame if that's really what you wanted.
Your bank is obliged to report any transaction deemed "suspicious", including transactions or series of transactions that you previously reported. Anyone working for the bank can decide that your transactions are suspicious for pretty much any reason. They are required to keep their suspicions secret from you. (Example: Gov Spitzer of NY's fall: http://www.banktech.com/spitzer-exposed-by-bankandrsquos-ant...? )
Basically, the government doesn't want people moving lots of untraceable money around, period. If you're wealthy and like to spend your money interacting with Federal law enforcement, go for it, but have a good attorney standing by and stfu.