While it is certainly possible that you tend to encounter a large number of braggarts who equate their worth with their technology, it's also possible that you are unfairly interpreting their comments in the worst possible light. I have seen posts on the Dis by people asking whether an iPhone or Blackberry is better, and I don't assume that they are bragging. I assume that they are truly curious about which device is better - that they wonder which one has better features and they are looking for feedback from those who own either device.
I love technology, I love tech devices and electronics in general. I'm sure I could easily come across as far too enthusiastic about them if I let myself. I enjoy how much easier they have made my life, I enjoy all the new things I can do with all my gadgets. I know lots of other people who feel the same way, and we often talk about the gadgets or debate the merits of one versus another. I enjoy Facebook and Twitter, and enjoy the way they have made it easier to keep up with all sorts of information. My friends and I talk about things we've seen on those sites, or about who (or what, in the case of businesses and organizations) we are "following". Apparently to you that can come across as bragging, but I assure you that isn't the case. Why would anyone feel superior to someone else just because they have a particular gadget or because they use a particular social networking site? Anyone can get any of the gadgets if they choose to budget for them, and they can also join any of the networking sites.
Most people I know who view a physical item as a status symbol want to be the only one who owns whatever it is, or at least they want to have more of it than anyone else - they want to feel like they have something special that others don't have and can not get. After all, that's what makes it a status symbol, isn't it? Most people who are really into technology encourage those around them to get whatever device they are particularly enamored with, which is why you get the iPhone fanatics preaching the benefits of having an iPhone, or the XBox fans carrying on about why the XBox is better than the PS3. They don't want their technology to be exclusive; they want everyone else to embrace it just as they have. I'm sure there are lots of reasons for people to feel that way, but the most common that I'm aware of is simply because they love whatever it is, and they think that everyone else will too. It's really no different than if you were to try a new restaurant which you discovered you loved, so you mentioned it to people often to encourage them to go there. I can't imagine anyone would think that you were bragging because you had been able to go to the restaurant - they'd probably just assume that you were so happy about having found it that you wanted to share it with everyone else. People who rave about different gadgets or networking sites are trying to share their love of those things with other people. It doesn't make them better or worse than anyone else.
There have always been - and always will be - people who view items as status symbols, whether it's designer bags, jewelry, electronics and tech gadgets, a big house in an exclusive neighborhood, frequent Disney vacations or any one of a thousand other things. But it sounds to me like you think if someone shows any enthusiam about technology or social networking it automatically means that they are judging their worth by that technology, and that's ridiculous.