discussed Cited "see, e.g." In Re Cendant Corp. Securities Litigation Cf. Childers v. Northwest Airlines, Inc., 688 F.Supp. 1357, 1363 (“Plaintiffs’ participation was an incident of employment and their only choice would have been to fore-go the receipt of benefits entirely”); see also Isquith v. Caremark Int’l, Inc., 136 F.3d 531, 534 (7th Cir.), cert. denied, 525 U.S. 920 , 119 S.Ct. 274 , 142 L.Ed.2d 226 (1998).