I went away from Thursday to Sunday, and it's amazing how out of the loop with online activities I feel after just these few days. Not that I personally have considered giving up my online activities, it took too much work to find my place here, but lately I have read many posts by writers getting discouraged and taking breaks and just kind of disappearing out of the blogosphere.
I can see someone never really get established with a blog, and realizing after just a bit that it isn't their cup of tea I love using cliches in my blog, it's the only place I can get away with them, and they'd rather focus their efforts in other promotional activities, well, then that's one thing.
But imho, going offline, quitting the blog or whatever, after a year or so because of boredom, or impatience, or feeling a time crunch-- then it's time to pull it together and realize that connecting with one's readers, one's demographic, with what's happening with the publishing industry at the ground roots level is all part of being an author right now.
Blogging and/or other online activities are part of the job. It can be fun but it doesn't have to be. Just like a real job. Just like writing that novel. Sometimes it's work, sometimes it's not, but you do it anyway because it's your job.