One of the recruiters reached out to me on Linkedin about an opening she was trying to fill for one of their clients. We had a brief 15min intro call, then scheduled a follow-up to answer questions their client had. The day of the interview she didn't show up at all. She did not email stating something came up, and did not even respond to my email about her being late. This was the most unprofessional experience I have ever had, especially when she reached out to me first.