The links provided are vetted. If a trusted site goes rogue (a common occurrence in the piracy world), the moderators usually update the thread or flair the post within hours. For a novice user terrified of viruses, the Megathread serves as a safety net. It separates the "scene" releases from the scammers, offering a clear distinction between trusted uploaders (like QxR or YTS) and malicious imitators.