Do assassins eat shrimp? Was I misinformed!??
OK! Thanks for the tip. I'm going to keep a close eye on them then. If they betray my trust, into my community tank they go...with Mr. Pinchy..Yeah, definitely don't worry much about losing Cherries. They're underwater roaches when it comes to reproduction.
I've had Assassins gang up on older shrimp, though. So if you're attached to any particular shrimp... could be worth considering a different arrangement.