Oggers : Ooops , you are right of course ! I mixed it up with F ( which if my memory serves me well was removed from the EUR countries that were using it and changed to E in 2 or 3 years ago )
I will amend my post , sorry about that , but does not change my reasoning though.
The advice I always give to ATPLs in my lectures is to avoid to go through isolated Cumulus bases as this is where the biggest concentration of Gliders will be , and to my gliders comrades to always call FIS above 2000m ( 6000 ft) and when overflying CTRs .
Being aware and Avoiding the ILS entry points is another advice , but not everyone is aware of them . Ramstein (ETAR in Germany) has even issued small maps for GA to prevent collisions . A good initiative , but info like this should be embedded into the normal 500.000 VFR chart .