The 'Cheddar Gorge Climbs' guidebook is part of the problem. I don't know how big a part but it may contribute enough to warrant some change in the next edition if/when there is one.
For example, if you don't know the access restrictions at all or in detail, you might open the guidebook at say Space Tourist on Sunset Buttress on p. 64. In orange it says at the top of the page 'Summer Season' and you are liable to go 'Yippee, we can climb it in the Summer Season'. This is what the person who logged a recent ascent of Space Tourist says happened with them. I have no way of knowing if that is true or not but it is certainly plausible. At the very least the guidebook should say at the top of the page 'No climbing in the Summer Season'.
If you read the information on Access on that same page, it says:
'The summer season access regime applies to all routes described. See page 10'. Nothing to suggest no climbing in summer yet.
The crucial information is on p. 10 for those who check:
'climbing is prohibited on the South Side during the following periods:
* Easter Bank Holiday weekend
* May Bank Holiday weekend
* Spring Bank Holiday week including weekends either side
* The school and general summer holiday period covering the whole of July and August and the first week of September.'
So, on the one hand it doesn't take much checking to find out. On the other hand, the potential to be misled is there.
Post edited at 14:28