Well we can't really assume either way, as OP was vague about how the site was left abandoned. They may have some arragement that would make this not copyright infringing. In the absence of any affirmative assent in writing reviewed by legal counsel, I'd be inclined to agree with you, and yet I sought to provide the best answer to the question provided, as the legal issues were outside the scope of the question as asked, and the legal issues you raised seem obvious to you and I, and ought also to be so to OP, but we can't make assumptions about the license of the content in question and/or the relevant jurisdiction(s), which may make these points all moot.