I can imagine that rent-a-friends will be robots in the future. 

What if you don't like the friend you rent?

As long as it's not rent to own, it's probably not a bad idea. No chance for buyer's remorse.

I only heard about "rent-a-boifriend". And only in the context of China. I supposed, it is true, it might be explained by peculiarities of Chinese culture (largely unknown to me).
It could make a nice plot for a romantic comedy.

Well... "rent-a-girlfriend" also happens with some businessmen, who need a lady with model appearance to accompany them at some public events.

@Andrey, I'm afraid, you must first promote these values in society in general. Because, I'm afraid, current public opinion is that ignirign public opinion is a harmful skill:)