Mr. Carny raises an interesting point.

There's an argument to be had with revealing our purple truths now, and then as the game goes on, seeing which truths are suspiciously tenuous and are on shaky ground theoretically. Also, by claiming now, whoever are the witches will have to come up with a purple truth immediately on the spot, and lies can be unravelled.

Furthermore, these lies can't be changed or edited, as that would basically mean they were lying. If they were really purple truths, they would be verbatim, and thus not require any other 'follow-ups' or amendments. Basically, they only get one shot at weaving an effective lie, something which will become slightly easier to do as the game draws on.

It's kinda like mass-roleclaiming, and if the previous game is any indication, it generates a heck of a lot of discussion while also inviting the possibility for the witches to trip up. Even going outside of meta discussion, I'm pretty tempted to reveal my purple truth because I don't see a reason why revealing it would damage the Town. Of course, it may do in some roundabout way I'm not seeing but then nobody's perfect.

I'll hold off for just a while longer though, to see if anyone has any reasonable reason why mass-purpletruthing isn't such a good idea. I'm open to suggestions: these new mechanics makes all of us amateurs