One can only sniff a local network. I can not type in an IP address and intercept traffic going to that system. There is no way any tool can possibly look at the trillions of packets floating around the Internet and determine which ones are destined for a single IP. It would be like trying to examine every single snowflake during a blizzard.
People have figured out some ways to 'fool' the system as it were. For instance, suppose that I could change the domain resolution of Bleeping Computer so that all requests actually come to my server first, and then are transparently passed on to the real Bleeping Computer website. I could then examine all of the packets. There are a few other ways also, but none of them are legal unless authorized by a judge, and so are largely left to law enforcement types.