To go or not to go
With reference to the thread linked from here
Beagle says all there is to say. VFR and Rule 5 and thats it.
As for carbheaton's analogy of the IMC rating. WRONG on all counts! The IMC rating has proved so successful that the CAA back it completely and fought for its retention and now campaign for its recognition by JAA/EASA. Weather related accidents rarely involve current IMC rated pilots.
Being someone who flys a fair bit on the continent in light aircraft i can vouch for the many incidents of mainland Europe VFR only PPLs becoming lost in poor viz and they do so on a very regular basis.