How can I avoid that risk for stealing as best?

The warning is because of an error while saving. There's a risk your coding could be lost, it's got nothing to do with someone stealing your work. Unfortunately, there's nothing you can do to prevent that. Anytime you post something online, someone else can steal it and try to claim it as their own.

A couple years back, there was an odd glitch that would wipe the entire pet profile if saved incorrectly. People lost weeks of their work. If you have the document saved in Wordpad or anything like that lets the code just be code, you'll be fine.

pro tip : if you make your stories suck bad enough, then no one will steal them

, Thank you for clearness. It's pity there is not really a solution to prevent someone steal yours.

, yes I have. :)

, meybe in a concept, but a bad or a good story is for a big part subjective. A story who's meant as bad is still not stealproof.

Then you'll be fine. c: