I know I wrote my comment in a "haha gotcha" style but my main point is that most people with disposable income have areas where they splurge, and areas where they save. maybe it's not the car or the computer, but I bet you own at least one item that your peers would think you spent too much money on.
instead of shitting on people who spend money on stuff we don't personally value, or imply they only did it to show off how rich they are, why not just assume they bought it because they enjoy it?