But next time, address them as though you are writing about the article, not about the person whose name is on the post. . . it makes it clearer who you mean. OK? Several others on here seem to think the same thing.
http://freerepublic.com/focus/f-chat/3319126/posts
I hereby propose The Thread Hijack Drinking Game. The rules are simple: When a poster tries to hijack an unrelated thread to his or her pet cause, you 1) reply to the hijack attempt by quoting the text in question, followed by the word "DRINK!", and 2) Take a drink (or any volume) of your favorite beverage (alcoholic or non-alcoholic). Moderation is suggested on animal cruelty threads to avoid alcohol poisoning.
This game will not, I admit, solve the thread hijacking problem. But after a certain number of attempts we will no longer care.