According to The Guardian:
The unnamed woman, a resident of Petrer in Alicante, south-east Spain, posted the photo on her Facebook page with the comment "Park where you bloody well please and you won't even be fined".
The police tracked her down within 48 hours and fined her.
Apparently, this is allowed in Spain so that police can "avenge their dishonor".
This is exactly the sort of behavior that leads to public distrust of police.
This story is a new take on online liberties in Spain:
A woman in Spain has been fined €800 (£570) [$886] after she took a picture of a police car parked in a disabled bay. She fell victim to a controversial new gagging law in the the country that prohibits 'the unauthorised use of images of police officers that might jeopardise their or their family's safety or that of protected facilities or police operations.'
Spanish story (more elaborate) here
I'd add a snarky comment here, but everything I came up with is just trolling.
Summing up my feelings: Spanish police: SRSLY, WTF?!
(Score: 0) by Anonymous Coward on Tuesday August 18 2015, @11:13AM
> Sorry, but the Constitution says your freedom of speech is not absolute.
(1) OP said it was fundamental, not absolute.
(2) The constitution is not above criticism
(Score: -1, Troll) by Anonymous Coward on Tuesday August 18 2015, @11:35AM
And if I were to tell you to suck a sack of nigger cocks, I will get modded down, even though my comment is fundamentally hypothetical.
(Score: 1, Touché) by Anonymous Coward on Tuesday August 18 2015, @12:34PM
Sure you will get modded down. But you will not get fined.
(Score: 2) by Translation Error on Tuesday August 18 2015, @08:36PM
(Score: 0) by Anonymous Coward on Tuesday August 18 2015, @08:29PM
Which is exactly why its amendable.