That is so very unlikely. A half dozen gringos walking around SJ a couple times a week probably goes unnoticed for the most part, except in the MP's they visit. The TV news crew obviously did a bit of research but I saw no footage of any walking tours.
If someone with enough influence to cause numerous police raids had a problem with the walking tours, don't you think they'd simply start to harrass the tours themselves?
The way this situation has been handled so far (closures and code violations) would favor the media event/soliciting payoff scenario.