The jury at Chez Foolmewunz is still out on this. I'd like to hear what they THOUGHT they were doing and what the cryptic comment by the principal meant.
At best, they're just totally clueless to the implications to other races than their own. Particularly since we just had the racial connotations all over the news in the Boeing incident in South Carolina.
I automatically discount:
Reference to Hangman. No. It's not like Wizard's chess. No one has ever played a word game with death seriously on the table. (Unless it's a "here go hang yourself" message but I'd think that would be addressed to the principal.)
Reference to suicide. If it is, it's totally incongruous because of the smiling/laughing pose. Also, most suicide by hanging does not involve a proper noose. ((Unless it's a "here go hang yourself" message but I'd think that would be addressed to the principal.)
A threat to blacks. The district is majority Hispanic with an additional 11% black. And it's an elementary school. Where would the racial animus come from? They've been teaching there for sometime. The usual target would be the principal (da boss) but she's involved in it.
Rustlers. I doubt that area of CA was ever a part of the wild west and haven't heard of gangs of rustlers or horse thieves.
Is there some sort of dispute between the school and district? School politics in CA can be quite messy. Unions have a lot of clout and some issues turn into pitched battles.
I'd like to see some explanation. At present it seems to be a clumsy and insensitive moment, but I'm open to other possibilities.