While Dumbledore would have used Rita to spread out the word that Voldemort was back, I think she would have looked for a way to undermine the message. I think Rita would try to sabotage both Dumbledore and Hermione for finding out the truth about her. I think Rita would have been slick enough to come up with another pen-name under which she would start writing that Dumbledore was trying to cause mass panic etc. And, of course, the Ministry would have encouraged her. Heck, I think they'd even give her animagus amnesty or something.

Lena/Gryffindor/5