When on a world the cheats are disabled, it is still possible to access them by doing "Open to LAN" > "Allow Cheats: ON". This is a bug because I have selected to not have cheats, the temptation is too high.
MC-49985
Allow cheats Bug
Resolved
Duplicate
0
Ludovico Rossi
(Unassigned)
Unconfirmed
Minecraft 1.7.5
Retrieved
It's not a bug, its intended. It has always been that way.