That depends on your viewpoint. The police have been "cracking-down" on kerb crawlers for years now.
If you mean are they less likely to be checking-out parks, laybys and other sites of interest, I should say no.
You may regard your activities as legal, but I think that the police and local councils don't.
Especially as carparks feature quite heavily as places where the next body is to be found, or another woman (or man) is mszW5CSVRxcMQ3KR .
In fact, I should say that the policing or closure of places used for "alfreso sex" is set to increase.
Just 'cause you think it's fun, doesn't mean that everyone else does.