No. The 'unauthorized area' term came from a comment about the suspension that Martin was serving for the marijuana baggie/pipe at the time of the shooting. Google it. You'll find countless references to the following quote:
Still, Trayvon had nonviolent behavioral issues in school, and on the day he was killed, he had been suspended for 10 days from Dr. Michael M. Krop Senior High School in North Miami-Dade. “He was not suspended for something dealing with violence or anything like that. It wasn’t a crime he committed, but he was in an unauthorized area [on school property],” Martin said, declining to offer more details. Before that, Trayvon attended Miami Carol City High School near his mother’s home in Miami Gardens.
Obviously, this explanation was not correct and it appears to have come from one of Martin's parents, but it's where the phrase 'unauthorized area' came from with respect to Martin's suspensions. And it was printed everywhere. Even in the wagslist article Was Trayvon Martin a Drug Dealer?
So, again, no.
I've searched, and I keep coming down to this: The bus driver incident was mentioned in a February 21 tweet as something of a question to Martin. As far as I can tell, there's nothing else on whether Martin swung at a bus driver other than the tweet.
My guess is that people speculated on the tweet, then others read the speculation and thought they were reading facts. Then they embellished, and their embellishments were taken as facts.
I'm still looking for a source other than the February 21 tweet, but that tweet seems to be the extent of anything about the bus driver. I'm not saying he didn't do it; I'm just saying everything seems to be speculation based on that one tweet.
it's reported that the other suspension was also for vandalism. Then again, the marijuana paraphernalia suspension was reported as 'being in an unauthorized area' by one of Martin's parents.
IMO, the only thing concrete that exists about a bus driver - and trust me, I've looked - is the February 21 tweet to Martin that says "Yu ain't tell me you swung on a bus driver."
Martin was killed on February 26. It's technically possible that the suspension included a bus driver incident and we simply haven't been told. The timing of the tweet is possible, but there's nothing other than the tweet that I can find. We know the story about him being suspended the day he was killed (see the quote in my post above) was a lie; Martin was killed on a Sunday, and there's no school on Sundays.