Manually disable folder shareability for sensitive information

So the use case is based on the desire of having sensitive information on Dropbox and eliminating the possibilty of accidentally sharing it with someone. The idea is for an option to manually turn off shareability of a folder. That way I dont accidentally create a link in a flurry and send our finances to a customer. There are other cloud services I could use that do this just for that information but who needs more passwords to remember.