Its not as simple as that. In my days as a councillor I actually got requests from people to remove bus shelters because they were an eyesore or encouraged urinating drunks or rowdy youths. They may be useful to you but not to others - and if you don't regad something as useful it does not give you the right to commit criminal damage, which is where we came in.
Yes there are similar signs in Spain, yes people ignore them and yes some people tear them down - all of which annoys the authorities even more and as a result, fewer and fewer places along the coast are now open to us. But away from the coast there is not the same problem (probably because there are fewer motorhomes anyway) so that is the way we will be travelling home, stopping legitimately along the way. We probably won't get wi-fi at most of these, so, once again, I will have to bow out of this conversation for a bit after today.