Often, substandard students might be tempted to hack into better students' computers--or, if they lack the competence to do this, to hire someone else to perform this morally repugnant task. This is a stupid and shortsighted idea.
If a substandard student submits a truly excellent paper, professors will likely become suspicious. It just does not make sense that a student who scored 37.5% on the midterm completed a paper worthy of a score of 95% or higher. Even if the professor does not use Turnitin to detect plagiarism, he or she wold probably also notice seeing two identical--or nearly identical--papers.
Quite aside from the disciplinary consequences of submitting a stolen paper as one's own, there may also be serious criminal consequences for hacking (or hiring someone to hack). If you think that life can't get worse after being expelled for plagiarism, just wait until the judge sentences you to spend several years in the slammer! In fact, offenders might face both state and Federal charges. On top of this, of course, these disgusting psychos might be further punished by their parents.