Playing with friends is an immensely more enjoyable and successful experience than playing with strangers.
This system has so much more potential than anybody realizes and it's being squashed out of the starting gate by it's very creators.
If Blizzard puts a paid gate up, and says 'This group gets to play with their friends any time they want, and this other group gets to play with random jerkwad strangers more often than not', it's brutally money grubbing.
If Blizzard expects me to pay ($15) to have the option to pay ($3) to play with a selection of people of my choice, they are mistaken.
There's a very large segment of wow users that believe, contrary to the corporate/Facebook program, what their mothers and teachers taught them - that spraying your personal information, name, and email address onto the net is a very bad idea.
If Blizzard requires Real ID to use this system of cross-server invites, it will only be encouraging the most irresponsible of behaviours in order to play with others of a skill level and temperament of our choice.
If Blizzard launches this service as a paid service requiring Real ID, I won't be renewing my subscription.
If Blizzard launches this service gratis, requiring Real ID to use it, I will be falsifying my name with Blizzard in order to use the system with impunity, as many others will as well, and I and everybody else who chooses to do so will start signing each other up like mad and I will get a much better grouping experience under the name of Zaeed Massani.
If Blizzard launches this service gratis, without the requirement of Real ID, or implements a Real-Alias type system, I will be mollified, but my trust in the company would still be damaged.
If Blizzard releases this service gratis, without a real-name requirement, and issues a statement from the CEO with a firm demarcation of what premium services they are planning to offer in future, and if said services are ethical and well-principled in nature, I'll be okay.
It's an MMO. Don't implement a system that could be so awesome for promoting bonding and playing in a community of friends, and put a price tag above and beyond the regular one on it. Don't even use Real ID, please, because many people have legitimate concerns about the nature of that feature as we saw so powerfully in the Real-ID forums fiasco, and it would have the effect of damping this feature's use. You've already got cross-server grouping - if we care to do so with random dweebs. Make it better, don't make it worse. Promote friend-making like what used to happen before the LFD came into being, where we'd all choose to friend that awesome tank or healer we met in a pug, and chat them up later and run s'more dungeons with them.
Bring the community back with this incredible, potentially game-changing feature. Up the dang subscription fee for all of us if you must, but make this egalitarian.
Blizzard, "I beg to assure you that I have never written you, or spoken to you, in greater kindness of feeling than now, nor with a fuller purpose to sustain you, so far as in my most anxious judgment, I consistently can. But you must act."
Think the community's bad? Play with friends.
Wanna play with friends? PAY FOR IT! MWHAAHHAHAHA