By FRANK ELTMAN, Associated Press Writer Wed May 18, 8:46 AM ET COMMACK, N.Y. - Last month, animal rights extremists followed the wife of a pharmaceutical company executive to her job, rifled through her car and stole a credit card. They used it buy $20,000 in travelers checks, which they then donated to four charities. A Web site announcement boasting of the act included a more sinister threat: "If we find out a dime of that money granted to those charities was taken back we will strip you bear (sic) and burn your (expletive). This is OUR insurance policy." The...