Rejection for these reasons …
You see one or more Member States as a threat to the public
Politics, internal security, public health within the meaning of Article 2 paragraph 19
Regulation (EC) No. 562/2006 (Schengen Borders Code) or
international relations of one or more member states).
… means that you need a lawyer specializing in EU law. It is a waste of time to get advice from the Internet as the answers fall into one of four categories …
- Get a lawyer
- Do something stupid (fake passport or covert entry)
- Jingos rants that tell you and your nature to stay where you are
- Incoherent hustle and bustle of random idiots
Individuals identified as a threat to the security of the zone have background reports that require lengthy discussions with a specialist, and there are no other viable alternatives. The same applies to questions about contesting the decision. Attempting to appeal for this reason is dangerous and also carries the risk that all of your content will be made publicly available! Contact a qualified practitioner!
The practitioner is also needed when the time window for an appeal has expired. There are data protection and freedom of information laws that require local expertise to navigate successfully. "Erase your name" is not an easy task.
Related answer: Schengen visa refusal: The reason for the purpose and conditions of the planned stay was not reliable
NOTE: To avoid the natural consequence, we add the following:
- The consulate has already been in the Department of Homeland Security
the United States you are trying to mobilize;
- The consulate has already told the other Schengen members about it;
- The consulate has informed its colonial missions abroad; and
- The consulate has informed the UK that you are trying to mobilize
The United Kingdom has itself informed the Republic of Ireland and the United Kingdom
Commonwealth members put a stop flag on their passport.
Update April 21, 2016
Questions from phoog (to whom I thank) about the possibility that this rejection is due to a false identity led to an exchange of emails with a specialist. The result is that this reason ("one or more Member States consider you a threat to public policy …") means that they have received a biometric hit or some other clearly positive match. It's not like the American no-fly list, on which people of the same name create confusion. Instead, it means that this person (and no one else) is in trouble and it won't be fixed in the near future. Therefore, the answer above still applies. I am completing the advanced law course in Schengen this summer and may add another update to this answer.
Also note that they will not use this reason unless they get a positive, verifiable match. Instead, they use the Schengen visa refusal: the reason for the purpose and conditions of the planned stay was not reliable
Suitable article for requesting your transcript from the Schengen Information System: How can I find out whether someone is in the Schengen Information System (SIS)? Note: Even if you find incorrect information in your log, you will need an experienced practitioner to officially remove it and restore it to its original state.