Folder security tab

We have a small domain here with a file server. no users here are on the domain. i have permissions set up for each folder for the users to use, but an issue i see is people can still see the security tab and edit it. if they try to edit it it says access is denied, but it still goes through after its closed out. i was able to get the security tab blocked, but then no one had permissions to R/W in their folders. any help would be great

thanks, 

steve w