Honestly, I'm very happy with the chants and it's about time the fans mobilized against the product. It's been shit for the better part of every year for a decade now and the fact that it used to be played off as a "smark internet fan" problem and not an issue for most of the audience was infuriating enough. Now that entire crowds turn on the product that is a great thing.
However, do I think WWE deserves to be shit on for CM Punk walking out? I'm kinda split on that to be honest. Now I understand where Punk comes from and his frustration building to this point. But to pick up and leave instead of just walking out at the end of his contract or give at least a two week notice so they could write him off? In the end it's his decision and I'm sure it's the best thing for him to do if he's burned out. But the guy wasn't exactly treated like dog shit by WWE either. He was a big part of their show, and while he might not have been champion, they did give him the longest title run. They gave him a Taker match. He was a top guy. I understand that Cena will always be THE guy, but it's not like Punk was treated as Ziggler, or even as Bryan.
Him leaving is a selfish thing to do, there's people on Monday that don't deserve their work being shat on and that will be drowned out by Punk chants, that's a shame for them. Also, Bryan was the focal point of the crowd turning on WWE and now Punk is stealing some of that thunder too, though I'm hopeful it won't be too much.
And contrary to Bryan, where chanting for him will force WWE's hand, there's nothing to gain from chanting CM Punk. HE LEFT, WWE can't do anything about it, it wasn't their choice for Punk to leave. He's gone and now they have to issue refunds and change VIP Axxess tickets and take Miz off of appearances on TV shows because Punk is there and no matter how loud the crowd gets, no magic will get Punk back on TV.
So while you can blame WWE somewhat for getting to this point, Punk was getting a high profile match at Mania in their main angle (Authority) and had the #1 RR spot. Sure, he was in a holding pattern and burned out from travelling, but he was hardly being held down by the machine as is the case with many other guys.