Why would you exclude senior citizens? AKA one of the most politically active demographics in the country.

Seniors don't riot.

However, they do break into secure nuclear weapons facilities....

Or insecure nuclear weapons facilities, in that case.

During recent riots in Turkey seniors were supporting younger protesters - bringing food, offering medical help etc.

And? Rioting is not the sole source of "threats to national security".

Indeed older people often form the intellectual leadership for all sorts of movements/organisations, good and bad. Especially in cultures that have maintained their respect for elders.