@Timandm: Well, actually, there's already at least one petition (courtesy of ), so by all means sign away. My own angle was more of a solidarity don't-buy-this-book call, but as a recent comment convinced me that cancellation wouldn't be enough to save the characters, I have taken to writing a letter. I will post it here once I figure out where such letters are sent (Axel Alonso? Joe Q? Probably not the actual Arena team...), so that anyone who wants to can also send it (after, of course, modifying it to fit their own commitment). I am quite serious about dropping Marvel for life if they kill off Laura, but I don't expect everyone else to make that kind of call. Still, it's how I feel, so it's what I'm going to tell them. The crux of my argument is that I will happily buy books with these characters in them in place of the book I'm not buying now.
I recognize that anything not creator-controlled runs the risk of stupid things like this. I'd swear off DC too, but I joined them post-New 52 and so I don't have any past with them to be pissed off about (but I know that there's a lot of that going on there too). I sort of envy people who don't get emotionally involved in fiction. I can't do it. I guess some of the jading comes over the course of so many events like the ones you just outlined (terrible, by the way). But for me to read, I have to care, and if I'm going to get hurt from caring then it's in my own best interest not to read. Bar none, if I had not gotten into comics, I would be a happier person right now than I am, without the anger and depression this franchise is generating for me.
Anyway, like I said, I'll post that letter soon enough. I'll be happy for anyone who gives me more than a "shut up, baby" response to it; should you feel compelled to send your own copy, that'd be awesome.