Hm. Odd... I've got the exact same line in my Dwarf entry, and hadn't had any skill rusting in my former, 10-year fort. This despite the fact that I'm sure I had many dwarves who had never used some of their above-Novice skills.
[SKILL_RATES:100:NONE:NONE:NONE]
This is what the line in my creature_standard entry looks like. It looks the same to me
Where in the dwarf entry did you put it? It seems to work if it's put at the very end. Maybe you put it at the beginning, and then [INTELLIGENT] is after it and implies the default skill rates or somesuch? Also, might you have inadvertently put it in the entity file and not the creature file? That's an easy mistake for people to make when they're just starting with modding.
I'm more concerned about attribute decay.
You can fix that, too, this these entries:
[PHYS_ATT_RATES:STRENGTH:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:AGILITY:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:TOUGHNESS:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:ENDURANCE:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:DISEASE_RESISTANCE:500:NONE:NONE:NONE]
[PHYS_ATT_RATES:RECUPERATION:500:NONE:NONE:NONE]
[MENT_ATT_RATES:ANALYTICAL_ABILITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:CREATIVITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:EMPATHY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:FOCUS:500:NONE:NONE:NONE]
[MENT_ATT_RATES:INTUITION:500:NONE:NONE:NONE]
[MENT_ATT_RATES:KINESTHETIC_SENSE:500:NONE:NONE:NONE]
[MENT_ATT_RATES:LINGUISTIC_ABILITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:MUSICALITY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:PATIENCE:500:NONE:NONE:NONE]
[MENT_ATT_RATES:SOCIAL_AWARENESS:500:NONE:NONE:NONE]
[MENT_ATT_RATES:MEMORY:500:NONE:NONE:NONE]
[MENT_ATT_RATES:SPATIAL_SENSE:500:NONE:NONE:NONE]
[MENT_ATT_RATES:WILLPOWER:500:NONE:NONE:NONE]
Ninja edit:
The solution was originally popsted here. http://www.bay12forums.com/smf/index.php?topic=72564.0
to recap
-snip-
That isn't actually original from me; it's from the wiki's page on
cheating via LordSnow (with some edits by me to make stat improvements be at their default rate). That which you quoted also doesn't include the actual skill loss token.