@derekjay, not to make it sound like this isn't a real problem, but, you'll always get fraud in any industry. This is simply put just another form of fraud.

I know the municipality take these signs down in many suburbs in JHB, from time to time and they also issue fines (if / when they feel like it, I guess), so there are some people like you who also feel they should do their part.

I wonder if it would help it you put SARS onto them? Since they advertise, it's easy to get their number The illegal immigrants won't be stopped, but I'm sure a lot of small "legit" businesses could be brought to justice?