Lured by $1 beer and the prospect of "hot chicks" and "hardcore fights," thousands of Arkansans were duped last month into appearing as extras in comedian Sacha Baron Cohen's latest staged mayhem. Cohen and his confederates organized cage fighting programs on consecutive days in Texarkana and Fort Smith. Both cards ended with two male grapplers (one was identified as "Straight Dave" and wore camouflage) tearing each other's clothes off and, while in underwear, kissing down their opponent's chest. This man-on-man action triggered Fort Smith fans to throw chairs and beer at the ring,