A couple of days ago I wrote a long and detailed response to a question about London hotels. The next day I went in to see if there were any other responses, or feedback from the OP. The post was gone.
This has happened before and I find it very frustrating. When I take the time to write a detailed answer, with explanations and pro/cons, looking up prices, etc., I am not just answering the OP but hopefully providing useful information to others with a similar question. I also like to see how others with knowledge of the topic have responded, to consider different points of view or matters I had not addressed. And I hope to get some feedback from the OP. This is not possible when the post is deleted.
So why do people do this? If everyone deleted their posts after getting a response or two, there would be no forum left to search, and all the valuable information posted here would be lost. So why does anyone think they should delete their post?