Keep in mind that the internet is a viable tool to reach out to others, and many people use this to their advantage. Tumblr is a popular website. There's not a lot of people that haven't at least heard of it, and many are making blogs every day. When concentrated in one specific place, especially a popular website, the numbers can seem overwhelming. However, it really works out to still being a very low percentage of the population. Take Youtube for example, when concentrated in one place, the numbers seem to be HIGH.. but in reality they aren't nearly as high as it seems. Do I believe that some people are gender confused? Yes. I do, but time will tell for each and every person out there whom is questioning it. People grow and learn more about themselves every day. They may feel differently than other people, and may think that being trans is why... They will soon discover what is right for them, and who/what they are.
Do what you think is the best decision for you. Don't worry about what others say or do; just know that the decision you make is what is best for you.
I wish I were happy in the body I was born in, or I was born in a male body.. either way would have been easier. Transitioning isn't an easy decision, so for someone to go through it - in most cases- means that they have thought it through. If they made a mistake, then I can almost bet that it is a mistake that will soon be discovered after beginning transition. I do believe that those numbers are smaller than the numbers of people that actually are what they think and say they are. As long as YOU are sure, it shouldn't matter if anyone else is.
My apologies if this is rather choppy or incomprehensible.. it is now nearly 10 am and I have not went to sleep yet lol