There are obscene amounts of "forged" stamped surveys and engineering drawings floating around.

Not like altering lines or anything material (I can already imagine the breathless replies being typed about how it's "antisocial" if someone's deck doesn't meet setbacks by 1ft or something) but changing text to remove references that would indicate other survey work was done that they don't wanna submit to public record, changing a labeled distance by a couple feet to make something that already exists technically compliant.

Like with everything else it's the little guys sticking their necks out. The big guys can afford good surveyors who "get it" and don't need to be told when a difference within the bounds of measurement error and will have four or five figure implications or that a survey result is so unfavorable that they should just call the client, bill whatever they would have charged as a consulting fee and not screw their client with the liability of a paper trail.