As eager as dirtsheets are to report what they deem inside information, allowing them to take almost anything as fact, it's not impossible for them to be right. Who's to say guys in the industry don't leak info for their own political means.
That is, if someone is pushing for a program with a particular wrestler, "leak" the rumor that the WWe is considering that feud or storyline, and if there's a big buzz over it, the WWE might feel inclined to run with it. Someone's career is stalled, maybe leak an actual story of what's going, heck make shit up and then pretend you're not denying its veracity to get yourself discussed on the internet.
Tired of someone's politics backstage hindering your career, or at least believe that guy is holding you back somehow, spread dirt about him to the interwebs reporters.
I don't think it's exactly a revelation that not being on of the boys can sometimes make for a tough road for a wrestler. Whether or not people think the Ultimate Warrior was and continues to be a total jagoff, he wasn't known for being one of the boys. I"m sure in some ways, that made things harder for him, but in other ways, it's how he found his success.
It's believable enough. But at the same time, Riley could easily be the one pulling a work on the dirtsheets for some free publicity.