Agreed that mindlessly changing hyphens to check-hyphens is one way some P3 automatons introduce more damage than they’re worth.

There is a general problem in DP that proofers introduce a check-hyphen when they mean “I really don’t like the fact that the original book had a hyphen there.”

Well, too bad.  If the original book had a hyphen there then the two options are:

1) Join with hyphen, or

2) Join without hyphen

“Throw the hyphen away because I do not like it” is not an option.

Typical example is something like:

….school-

teacher…

Where the two plausible answers could be:

…school-teacher…

or

…schoolteacher…

and of course the proofer automaton changes this to

…school-*teacher…

meaning “gee I wish the author had written this as:”

…school teacher…

which of course is not an option.