What would you do about this unprofessional conduct?

My coworker/friend went to an oral surgeon for a consultation. She had a brief conversation with the x-ray tech, weather, teeth, nothing lasting more than 2 minutes. The next day, the x-ray tech (also female) texts my friend and invites her to a halloween party. Keep in mind, they are both in their 40’s to 50’s and didn’t previously know each other. Friend ignored text message. X-ray girl texts back again to say she wasn’t sure the message was sent and asks again. Friend answers with a “no thanks”. X-ray girl texts again that if she changes her mind, just call. She texted 3 more times that day to say she wanted to be friends, it was hard to meet people, etc. Friend ignores them. X-ray girl waits a day and then calls friend and texts her! Creeper. So obviously, X-ray girl got the phone number from friends file. Friend no longer wants to go back to this oral surgeon, but should she report X-ray girl? She is afraid she will get her other information from her file and possibly retaliate. But, it’s not fair to the oral surgeon that his X-ray person is stalking patients. What would you do?