Users can use worlds with creative mode by altering the level.dat file.

Add a protection layer so that this does not happen. pls refer the screenshots below

This is an issue I have been facing. everyone i know is using this method to access creative mode on Windows 10. I know that this is not good for players and mojang. please implement a code protection layer.

 

In the pic given, you can see that by altering one satring of code, creative mode and commands is accessible. 

 

Steps to recreate:

1. Make sure to have some sort of NBT Editor (EG. UniversalMinecraftEditor)
2.  Open the NBT file 
3. look for the data which tells 'CommandsEnabled'
4. change the value to 1

These are the steps