What makes this even funnier to me is that in one of the official manga, they basically explain that the bean throwing does jack shit.
Bring out Remilia?
Aah...
Our sincerest apologies, but the Mistress is currently away...
If you wish to conduct bean-throwing, then perhaps we could get you to target Lady Ibuki Suika inst-...Well, well, if it isn't Lady Hakurei Reimu. What might your business here be this day?