Whatever anyone tries to do--it will be subject to "whatever official you get when he gets you and just how HE/SHE decides to interpret Schengen."
The real problem is that NO ONE--I mean NO ONE actually understands the rule
The reason we had a problem in the Azores
back in 05 was that we were given wrong information FROM IMMIGRATION. I distrusted the info but after an OFFICIAL meeting with them-they confirmed that WE9the crew) had 18 months in Schengen. THEY said it not me. So we went with it. Then three months later got burned by the SAME office e that gave us the wrong info. And, of course, the people that gave us that info ran for cover.
So--whatever anyone does---you are still "in it."
Just yesterday there was a knock on our boat---Policia Nacional de Espana. Very polite and friendly--but--the FIRST question they asked was --do you have in INBOUND stamp on your passport? A Stamp INTO EUROPE! At this point we are still legal
but--they stood there and counted the days and even though we have a few weeks left legally---it was becoming a bit tense. If the guy can't cont we're in trouble.
Don't laugh---we had an incident in Costa Rica
where the Port Captain
counted our days in country and he insisted that November had 31 days---worked everything accordingly and he would not back down. The guy with the gun / badge / stamp makes all the rules at the moment.
I have seen and been party to so many situations like this all over the world--it's like a bad movie
except if you are on the receiving end of something like this it is not so funny
Be careful! Play that somebody changes things but I don't see it happening any time soon.
Just yesterday in the local paper was a piece that The Balearics are so overrun with tourists that they want to apply strict tourist limits.
Don't want to sound gloom and doom but the reality is that you must be careful and plan well and even then---???