What a disappointment. Went to visit an open hous...

What a disappointment. Went to visit an open house posted by Darren Mancuso and got there to find a note on the door that it was cancelled due to a family emergency. Surprised that no one could update the website to cancel the open house. When I stated my complaint the operator transferred me to the realtor's voice mail? Are there any standards/ethics for realtors?