I was just at Six Flags Darien Lake on Sunday, and I must say...
I did see them. All of the Six Flags Warner Brothers characters were there... er...
BEFORE THEY OPENED
Before they opened up the park, where they have it roped off, all of the characters and their helpers came up to greet the guests. About 3 minutes before they actually opened up the park, the took off...
Since then, from all over the park as I was... I didn't see them one bit (I was even in the Loony Tunes Sea Port and didn't see them!!!).
It must be some kind of conspiracy.