It is enough to go to the NASA website or just search one google to see pictures with the earth being round and a lot of live videos also that are showing this.
Mind you, photos can be manipulated, and you can't trust anything you read on the Internet :-)
If these were manipulated someone would have noticed. It's NASA after all. Over all yeah, you can't trust on anything on the internet.
NASA is a resourceful agency that are experts at manipulating photos and videos. I read so at the Flat Earth Society wiki :-)
At the other hand, I don't think so many poeople over such a long time would be able to keep such a secret.
When you want to prove your theory you can find thousands of childish reasons to do that and that's what this flat earth society is doing. I like conspiracy theories and some of them have been proved to be facts after all, but this one is far from convincing me. I've seen it in all kind of tweets, but I think it's just a discussion trend that will be forgoten by the next year. Then another thing will come out to "amaze" the public opinion. Meanwhile some seek minds destroy Sirya to show off their latest "war toys". You're right you can't trust anything on the internet so I trust that the earth is as round as it is for ages .