Moderator Edit
Regardless of whether or not the world has cheats enabled (for example, if I explicitly mark cheats as disabled when creating the world), cheats can be turned on by merely clicking Open to Lan > Enable Cheats. This effectively renders the cheats option in the world creation page useless, and breaks the entire command hierarchy system in single player.
Title speaks for itself, I don't think we should be able to switch to Creative or have Allow Cheats be an option with Hardcore worlds. As it is now I can open the world to LAN with cheats, switch game modes and fill my chests with diamonds!
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I posted this on r/minecraftsuggestions and everyone said it was a bug not a feature. Oh well...
The problem is that this is opinionated, it's not a clear bug on how the system works, it's a suggested change.
Isn't there an option for new features?
First someone posts a bug in "suggestion" format, it is closed because of that, then all further reports are closed as duplicates?

Reopened for reconsideration
Affects 15w47a
Apparently this got resolved again.
I'm not sure if this would be considered a separate issue, but you can also set the default gamemode to a mode with higher privileges than yourself. For example, you are in adventure mode and then invite players in creative mode.

I suspect that's also working as intended.
Don't take this the wrong way, but has this been confirmed WAI? I haven't seen a source on anyone saying so.
@unknown made changes - 24/Nov/15 10:26 AM
Resolution | Works As Intended [ 6 ] | |
Status | Reopened [ 4 ] | Resolved [ 5 ] |
source enough

@unknown made changes - 24/Nov/15 10:26 AM
Resolution | Works As Intended [ 6 ] | |
Status | Reopened [ 4 ] | Resolved [ 5 ] |
Source enough ?
Edit: @unknown: LMAO
@unknown me too
Ha, how could I miss that? Thanks, guys. 😉

The moderator notice has a typo ("wether" instead of "whether").
Hi there, unfortunately we do not allow feature requests on the bug tracker; this system is specifically for bugs found in Minecraft.