Yep. They are a weed. If you want to frag then, just put a plug somewhere near or on top of them, it'll be covered soon enough.
I've been ripping them off with tweezers, mojano wanding, calc injecting, and cursing their existence for a year now. They just won't die without me sterilizing the rock and I'm not prepared to go that far just yet.
Majano wand worked best out of all the options used so far.