I'm gonna chime in on this issue regarding Modern Orthodox Jews and texting on Shabbas. One either keeps Shabbas or they don't. Half Shabbas? What the hell is that? I don't touch a TV, DVD, bluray player, remote, my pc, or phone during Shabbas. I'm not a texter and never have been, but the texting generation is addicted to texting and can't go 25 hours without their phones. But to use the term Half Shabbas is a form of blasphemy if you ask me.
If one must text on Shabbas, it's the same as writing, which is a form of work. It's simply not allowed. Now amongst the other movements of Judaism, it's a different story. Trust me. I know from when I check the newsfeed every motzi Shabbas. The worst is seeing all the postings after Yom Kippur.