Natural_Causes says:
... dice rolls can't be modified but the text can?
That is pretty much what we have already. You can only add more dice rolls to a post, not change existing ones, nor their descriptions.
Natural_Causes says:
... not sure I fully understand the cheating issue ...
I think the 'cheating' issues were:
you can delete a post with a bad roll and add another post, hoping for better rolls. I have not encountered this, I tend to play games where 'bad rolls' are not a bad thing and players desire them to add interesting elements to the story, but others might not feel the same.
But also, with specific regard to the topic of 'editing' I have seen players who never 'fail' at important things, but always claim they were doing something trivial when the bad roll happened. Editing the post (or worse, post "TBD" and waiting to see they dice outcome before describing the action) can lead to this.
Natural_Causes says:
... I edit my posts pretty frequently. Mostly it's for grammar, spelling, or upon looking back I realize I didn't say what I meant to say clearly. ...
That last one is a problem. If what you said was not clear and people have read it, you need to make it very clear what you changed so everyone is on the same page.
Many of the 'grammar/spelling' edits would be considered "minor edits" since they
might not change the meaning of the post, but clarifying something that was not clear is a "major edit", and everyone needs to go back and read it again... and also need untangled what was said before from what is said now with no easy way to see the exact changes made. Either the edit needs an accompanying list of changes (a 'diff', if you will) or it would have been better to add another post saying "oops, I meant to say...".
This might just be my opinion, but I play with neurodivergent players who struggle a lot with reality and having players 'change reality' by subtly editing post is as major problem for them.