In reply to springfall2008:
The only areas I can see coloured blue for access after 6pm are Horseshoe Bend, Yew Tree Wall, and Ginsberg Wall. Space Tourist isn't on any of those.
I've never found it confusing, it just takes slightly more effort than checking today's date. If someone has the capacity to use a guidebook to successfully get to the crag and identify individual routes, then they have the capacity to correctly identify the name of the entire crag and read the access notes for it.
You can pretty much take a conservative guess which access agreement applies to different routes by looking at them anyway - if it is high up or multi-pitch and therefore a chance of something falling a long way onto the road without warning then it's winter only. Single pitch roadside crags; only outside bank holidays and school holidays. During bank holidays and school holidays, default assumption for any south side cliffs is no access.
Edit: Seeing ericinbristol's post, if signage on the ground isn't clear which crags are being referred to then that could indeed make it confusing.
Post edited at 12:32