Vince McMahon and the WWE are notorious for keeping their talent on a tight leash - with reports surfacing from time to time showing just how much control they have over the ever-changing cast of superstar wrestlers.
A recent law suit from fired wrestler Alberto Del Rio is a prime example, with the wrestler having to go all the way to court in order to remove a 'non-compete clause' in his WWE contract which prohibited him from wrestling with any other company even after he had been let go by the organization.
And now it seems the WWE hierarchy have been left reeling once again after Rey Mysterio, a man not seen fighting in the company since WrestleMania back in April, had the audacity to fraternise with a rival company.
The Wrestling Observer today noted that WWE bosses were far from happy with pictures that have emerged showing Mysterio at a recent AAA Lucha Underground taping in LA.
The images showed Mysterio backstage at the event as well as in discussion with members of the El Ray Network promotion at an evening dinner.
The photo evidence has now been deleted.
Rey Mysterio has previously registered a level of interest in working with the AAA organization when his current WWE deal expires, and as such it is perhaps no surprise that the WWE were unhappy with the wrestler's recent movements.
At the end of the day Mysterio still has a contract with the WWE at this time, and in fact those in charge at the company feel the veteran owes them a year on the roster due to recent injury time off.
So whilst his exit from the organization has been rumored for a while, McMahon and co were never going to be happy seeing him talk to potential new employers when they themselves have not come to a conclusion on his own future.
Of course Mysterio may well have simply been showing support for a wrestling promotion of his native Mexico, but as the Del Rio clause above shows, the WWE don't like to leave these sort of things down to chance.
Mysterio's appearance at an AAA event in particular may be the cause of much of the frustration on the WWE's part.
With Alberto Del Rio now attached to the Latin American company (under the name El Patron Alberto) following his WWE dismissal, and Ricardo Rodriguez, another exiled star who has riled the WWE with recent accusations, involved in the El Rio Network with whom Mysterio is alleged to have held discussions, the promotion has already irked it's bigger rival this year.