Other than a few smarmy assholes, I don't fault the people who set these things up or who take advantage of them. I have plenty of friends who've been involved, and while I may needle them about it offline from time to time (like when a top 20 # at MSG 1 was sitting next to me at the bar day of show), I don't blame them for the band's management's inability to organize things themselves, and make it public to everyone.
I do think check in are bullshit. You show up, you sit, you wait. Other than a couple of bathroom and food breaks, that's it. He/she who waits longest gets the first spot, and so on and so on. THAT is how it used to be, the camping you referenced Gabe, but that's not this. It's kept in semi secret because a whole lot more people would come and "check in" if they knew that was an option.
Blatantly ignoring the requests of venue security is also BS. If they tell you to scram; scram. Setting up shop at the Dunkin Donuts a mile down the block? Who in their right mind would think to look there unless they had an idea beforehand? And then people show up at the place they're supposed to be at according to the information given out by the venue, at the TIME the venue says they're supposed to be there, only to be replaced by a marching horde of cruller wielding fans who were off site.
And the people who do things like toss Manchester out as a reason why they do check-ins are the worst assholes on earth.
The band makes enough money off of these shows to set up a true system and have it staffed properly. The only thing that stops them is management indifference. They'll send people out if/when there's a percieved issue, but that's it.
If the band wanted to say that the current system is the way they want to go, and a designated "check in" spot will be established a few days out, but by a certain time on shoenday you must be in your spot in line, no exceptions other than potty and food? Okay. Great. But say it and publicize it. Don't keep it in the dark where only fans who know or know where to look can take advantage of it.
With the exception of a few overly vocal douchebags; this is on management, not fans.