But what is the point, really? SBCL will disable type checks with safety=0, LW will enable with safety=3, debug=3. Is the point "read your documentation before

But what is the point, really? SBCL will disable type checks with safety=0, LW will enable with safety=3, debug=3. Is the point "read your documentation before relying on things"? Or is the OP's point that SBCL shouldn't exist because it's "poisoning" and "a bad thing"? That's the problem with such FUD, can't ignore it or somebody might actually believe it, can't just say "nonsense" since that's not convincing.