i created http://issues.freepbx.org/browse/FREEPBX-10934 and thought it would see more up votes ...
i had my first request to limit follow-me hours recently and the thought of a TC per DID was disheartening, not to mentuion it still leaves it open to tranfers
if you dont catch it inbound with a TC the only other option i see would be specifing an outbound route for the follow-me number and associating a time group with it - of couse this would then prevent any direct dials to the number from other sources on the pbx as well 
if you've encoutered this request how are you handing it today ?
if you have ideas on how me might do so in the future please use the issues ticket