Actually people are counting your trips. Retailers are reporting issues to their head offices who are then communicating with the Police and other agencies.
This information is all then collated and used to assess whether the steps taken are working or not.
I work currently for a large shopping centre. I've been gathering this data and passing it on myself. That is my first and last wfh task each week. And it is acted on.
What problems have the retailers faced, how are the stocks, are people complying with social distancing measures. Are they coming only when it is essential?
We have had a PCSO stood in two of the shopping centres constantly as the same people are walking in and out of the shops, browsing, chatting, complaining. The same faces are popping in several times per day. They are standing closely. Hugging friends they see. Visiting the shops as whole families, with people they don't live with. It's embarrassing and the staff are terrified.
For everyone who has some excuse as to why this doesn't apply to them, tell Spain that. They didn't take it seriously either.
My tangent about the people I know personally is not going to be reported or of interest to many but the fact is the same people are doing it over and over again daily. And that is what will lead to lockdown along with social gatherings etc.