Definitely the cool factor!! Hopefully, the school doesn't decide to make an issue of your "colorful" stickers.

I was concerned so I did an audit of the stickers, and the worst verbiage on any of them is the word "piss", so I think we're good...
I was thinking more of a political issue than a verbiage issue.
She's been wearing HIGHLY political shirts, calling out and challenging teachers that make snide political remarks unrelated to the subject material at hand, taking and defending the side of light in debates, etc.
She's already learned the hatred from the other side, but more importantly, found the bonds of friendship forged in being persecuted and the strength to stand up for what is good and right.
I.E. There's no stickers on that Valk she doesn't agree with, support and is willing to back up and defend personally...