I'm not sure what the risk might be apart from an SSSS (ticket's in her name), but the strange thing is that we never even asked AA to do it - I never realised it was happening until she mentioned to me that she had flown to CDG to meet me and was able to use the Admiral's Club in BOS with a coach ticket. Since then, any tickets booked through my account for her name have shown up with a PLT stamp on the BP.

PS - only flying the Mrs. in economy because business class wasn't available!