Silly decision, Greece is an island within the Schengen area (they have no common borders with any other country in the Schengen area) so it's easy to extend the border controls to planes and ships from Greece and reinforce border controls in Hungary and Austria (what is already a reinforced one because of the huge numbers of illegal immigrants from Kosovo in the last year).
I´m Austrian and there are no border controls reinforced because of immigrants or other things.
All borders from Austria except Swiss and Liechtenstein, are to other EU-countries.
This summer there are for a few weeks border controls, because in Bavaria/Germany is a summit conference of G-8 and in Tyrol/Austria is the Bilderberger meeting at around the same time.
Sorry my mistake, the "already reinforced" meant that the Hungarian border control have been reinforced recently on the southern Serbian border.
Also forgot Slovenia what is part of the Schengen zone.
So the let me correct myself: ...and reinforce border controls in Hungary and Slovenia...