Seems like a smart way to catch inexperienced/up and coming cheat devs. How many non-cheat devs really have IDA on their gaming PC? I did and it was for developing cheats
You can basically patch the executable to skip the function that locks you out
( To everybody reading this : if you like computer and puzzles, you should absolutly try to reverse-engineer a simple binary at least once. It's fun !)
Honestly, banning players because they have RE tools feels like a generally counter-productive idea. Best-case scenario is that it'll require an engineer who was actually going to RE game files to get another account, stalling them very briefly. Worst-case scenario is getting someone with technical skills and free time pissed off enough to actually start messing with the game (potentially, in a less respectful way than your average cheat developer might - looking for game-breaking exploits than just automating things or providing extra information to the player), even if they didn't mean to.
Specifically those for single player games, I've used them to finish games so I can view the story/endings.
A less permanently-severe but real example: A Windows game which terminates (with no message) if the user opens "git bash" (cygwin).