Apparently the Greek authorities have run out of tear gas and are asking neighboring countries for some of theirs, in order to control enraged, and apparently unemployed, protestors. I think it's manufactured outrage and these derelict kids just don't have anything better to be doing.
Whined one dumb protestor, “We found tear gas canister dated from 1981,” said one demonstrator, calling himself only GK. “The old chemicals make us sick, people have fainted and have trouble breathing,”
That's kind of the point, moron! Heaven forbid if the cops use riot deterrent that actually deters rioting.