Angela Maiers got a note recently from a concerned teacher which she posted on her blog (thanks to @Linda407 for notifying me). The note basically articulates the tenuous position a teacher finds himself in after the school has issued policy stating that social networking (facebook/twitter, specifically) is not permitted at all during school hours - not even during the teacher's duty free lunch hour, according to his contract (must be a union state). The teacher is an avid user of facebook and twitter and so is very concerned and frustrated with this new policy and is at least considering violating it, even if it makes him a "martyr."
So, both he and Angela asked about the legal issues surrounding this situation, so a quick refresher followed by some advice.
First, duty free does not necessarily mean duty free, at least legally (see, for example Texas' law). Perhaps the union in that district negotiated that provision in the contract (good for them) but that provision does not mean you have no relationship with the school during that 1/2 hour.
Now, breaks (meal and otherwise) are actually not a real clear legal area. There are just not all that many laws out there on the rights and responsibilities during breaks (if you are interested, here they are). Anyway, the lack of legal clarity here is probably bad for the employee's case as it gives employers lots of flexibility during these periods. So, I hear you saying it, "I'm not even getting paid during lunch." Yep, that's true. But, you are also not getting paid in the 15 min. before school officially starts nor the 30-45 min. after school officially ends, yet I think most of you would agree that a teacher feels some level of responsibility toward the school during these periods.
All of that is a long way of saying ... if you are at the school while the kids are there, you have some responsibility to be a teacher. How much? What types? That's all hard to say and would probably wind up being a roll of the legal dice (and cost you $10,000 or so) to find out.
Next step, what if you leave school premises and tweet while at McDonald's over lunch? Well, while the on-campus responsibilities will not apply, this is when the teacher lifestyle regulations kick in (side note: apparently Dave Schimmel has started convincing people to refer to such regulation as "teacher out-of-school conduct" - not sure whether I buy into that yet; I'll probably post on it eventually). Historically we have always given schools some latitude in regulating teacher behavior even outside of school (you can watch this module if you want to know more), so when your tweet pops up at 12:13 pm on the principal's tweetdeck account ... there is at least a legal avenue by which the administration can make an argument for regulation.
Okay, I don't want to be Mr. Doom and Gloom entirely, so let's quickly look at the teacher's rights. Teachers are provided some expression rights and depending on the content of the tweet, that might come into play to protect the teacher. I won't even get into Garcetti, but I have before so you can read it there. Also, the contract language of a duty free lunch could be construed the other way to protect social networking during lunch (again, that's a roll of the dice, depending on your state). And, if lifestyle is their argument, I think the teacher could make a good case that no natural nexus exists between social networking and school (although I know some would disagree).
So, the bottom line as I see it (again, see disclaimer on right ... not legal advice) is a mixed bag and probably a legal fight. There is enough uncertainty in the law that the school might be willing to fight, meaning a lost job plus high legal costs for the teacher. Is tweeting during lunch worth it? I highly doubt it.
Look, the real problem here is this school's disdain for social networking. It is probably unfounded and reactionary, but it is real. If I were the teacher, that's the issue I would spend my time working on. Make it clear to the principal that you will abide by their rules, but that you disagree with them. Then, ask if you can set up a Twitter account for them. Or, friend them on Facebook. Or, show them Ning or Buddypress. Give them the names of principals in nearby districts that use social networking (your tech. coordinator will probably know of some). Ask to form a committee to review the policy. Ask to present that committee's report to the board. You get the idea. There are lots of acceptable, totally legal, avenues that you can take (it is still a democracy, after all).
A kamikaze mission might change the policy in your instance, but it won't change the hearts and minds in your district. Your responsibility is to change the hearts and minds, not to go down in a blaze of glory.