Adam Johnson, the creator of YourMovieSucks.org, reviewed Derek Savage's film Cool Cat Saves The Kids. Savage liked Adam's review and even filmed him in a cameo for this movie. However, when Savage was deleting YouTubers' reviews of Cool Cat Saves The Kids due to copyright infringement, Johnson made a video explaining why Savage's accusation of copyright infringement was wrong. Because of Johnson's video, Savage deleted his cameo from this movie.
In the United States, real-life firearms specialists and experts must first enroll in an accredited program to receive certification after either completing a series of education courses or after demonstrating an already sufficient level of skill and expertise based on one's present knowledge. Derek Savage reveals no such background when he proclaims himself to be a "gun expert," and several of his on-screen practices, such as leaving his finger on a gun trigger when not intending to fire it and suggesting an empty car seat is a proper place to secure and store a handgun when not in use, run contradictory to a firearm specialist's primary distinction as someone who is supposed to be conscious of safe handling practices for a firearm and can competently explain said practices to others.
In a promotional clip called "The Savage Crime Show" that he posted on YouTube--which is meant to play like a Fox News show--Derek Savage shoots a target in the desert showing the logo of YouTube comedian "I Hate Everything" (or "IHE"). IHE had reviewed Cool Cat Saves the Kids on his channel, but Savage was not a fan of the review, and copyright struck it on YouTube. The feud escalated to the point where IHE had reason to believe that Savage impersonated a phony law firm in order to intimidate him.
Near the end of the documentary, Derek Savage taunts any "bad guys" who are potentially intending to commit gun violence, inferring that if they attempt any harm in Las Vegas, they'd be in for a "bad surprise" because the sheer numbers of other gun owners in the Las Vegas metropolitan area could potentially stop them. However, just one year following the release of this documentary, gunman Stephen Craig Paddock, in possession of multiple semi-automatic firearms, opened fire on a crowd in Las Vegas from a hotel room window, killing over 50 people and wounding over 500 more, making it the single bloodiest mass shooting in United States history.
Derek Savage claims at one point that he had prior work experience in "the machine gun business" when touting his firearms expertise. In the early 1990's, Savage was charged in the State of California with being in possession of an unregistered machine gun. He was found guilty, and the verdict was upheld by the US Court of Appeals. (United States v. Darryl Ray Evans, A/K/A Derrick Savage, 978 F.2d 1112; 9th Cir. 1992)