I think the basis of perception that Internet friends aren't real friends is basically cuz you don't really know if the person is legit. You can't go out and hang out with them so there's always the wonder in the back of your head, is this person really who they say they are? It's too easy to lie on the Internet. Which is why there's so much uncertainty. I know my parents were not a fan of me being on this forum at first and did not want me to get too close to anyone, for fear of getting lured by a predator. While it is true that predators do prey on naive Internet-users, they can't really do anything unless you give them the information. Use your own judgement.
The benefits of talking to someone in real life? Well it's nice to have someone to do something with outside the house. The only thing I hated about having such close friends thanks to PC is that we could only hang out over MSN or on the forums. We could never just go out and see a movie, or something. Negatives? I dunno, there aren't really. I would say you might have to see someone too often, like at school, but that's not much of a negative. If you're tired of seeing the person then just stop seeing them. I don't really think there are negative aspects to having real life friends. It's pretty pessimistic to find negative attributes related to having friendships lol.
Benefits of talking to someone on the Internet, and I like this one a lot, it's okay to ignore people. For a certain amount of time, anyway. Think about it: you're on MSN, and chances are MSN is not the only thing you're doing. Someone sends you a message, the screen flashes or you hear the little jingle. You might read it, you might not. But the person on the other end is not gonna get frustrated if you haven't answered within the first thirty seconds. Compare that to talking to someone on the phone or hanging out with them in real life, if they say something to you, and it registers, but you just flat out ignore them, they're gonna probe you about it. Negative aspects to having in real life friends is as I mentioned before. One thing I really like about having online friends is how much more rewarding it is to finally be able to meet one of them. I've met several people that I had originally met on these forums, and it's always been a great time hanging out with them. You almost don't believe it at first, you're so used to only talking to them behind a computer screen.
People are wary of the Internet because you never really know who you're talking to. Everybody goes by a pseudonym that probably doesn't reflect anything about them. And it doesn't help that all over the news, we hear about scams committed over the Internet, of predators luring young girls and boys into their homes to rape them thanks to the Internet. But you never hear about the happy-ending stories. I travelled all the way to southern California, from eastern Canada, to meet somebody from these forums. By myself. Had there been a predator waiting for me at the airport, I would not be writing this post today. But I had faith there wouldn't be, because I hadn't only been talking to the person in California for 2 weeks. It had been roughly 4 years. Predators don't commit to one person for 4 years. They wanna get a bang as quickly as possible, and anyone will do. If you don't seem like proper prey to them, they won't bother.