In this context it is ridiculous that a dog test is considered a probable cause for a police search: news.ycombinator.com/item?id=10942196
Being physically searched by men with guns is not something innocent people should be subjected to with no, or just the thinnest of illusion of justification.
Are you fine with black communities being ruined by crack cocaine because police can't search people? Of course not, that'd be a ridiculous thing to think.