I don't hijack for snark. I hijack just because it's what I do. Most of the time I do it to keep things light (and maybe if I post enough the pictures of bleach cream will be a few pages behind us).
And seriously, who doesn't want to talk about purple four wheelers? I know I do. My lumberjack brother and his wife are particularly interesting things for me to talk about. If other people don't think it's interesting, they can stay on topic.