Hi, i've been lurking this forum since the summer ever since Lauren Spierer went missing because reading theories and such really interests me. In short, long time lurker, first time poster.
I'd like to provide a little bit of insight on this case, i'm probably one of the youngest members here and perhaps in this thread as well. I'm 18 (studying Crim in September!) and in Sierra's age range.
Being actively involved in social media, i've looked at her tweets and tumblr and what she posts/tweets is nothing out of the ordinary. I've got a significant number of friends that reblog/blog/tweet about drugs and cuss. It is merely a phase and red flags should not be going up because of this.
Being an avid texter, I text at the bus stop to pass time. I have two theories at this point 1) being Sierra was occupied with her phone (surfing the web on her phone or whatever) and that was when the prep had his chance to make his move as Sierra was leaving the driveway. I'm not feeling warm and fuzzy about the mom's bf.. it would make a whole lot of sense that he was involved in the kidnapping if the scent ended at the driveway.
If you have any teenage questions, i'd be happy to answer them!