... Should the Safecoin devs have fixed the bug before launching the coin?...
Op err is not a bug. There was no "bug" to
fix.
That being said, SAFE coins
aren't safe from random, non-consensus mutability; good to know that there's another coin out there I'll never use.
Yet here you are.
SAFE has continued to garner support and has been strengthened by your eager efforts to undermine it. So maybe we all should thank you for that.