Patty, that's a great idea with the "pinning" of the semps to help with security and stability of your plantings!
I mix my knowns (w/their labels) and noids together in one bed and try to keep an eye on things staying straight. I haven't noticed any critters trying to re-arrange, just critters trying to fertilize my semps whether they need it or not...
It's just frustrating to hear that something I've labeled after choosing it for it's color needs to have its label tossed (this brings to mind watching Lynn flinging a label over her shoulder after being informed that there was an imposter in her semp bed...
)