Does ROBLOX.com give you a virus?

Actually, this game doesn't infect your computer. However, it is an open port that can give you a virus. Some advertisements contain malware. And being that you have installed and allowed the application 'RobloxApp.exe', the malware, spyware, or virus will attach to your computer.
If you're talking about the interactive place games, yes. The place games, where you build your own game, has viruses. But, these types of viruses are easy to remove!