This garbage article doesn't mention what he was charged with. After a search, turns out he was charged with criminal damage, and his main defence seems to be that he used washable paint so didn't damage anything. Nonetheless the prosecution claim it cost £7000 to clean off.
I think people unquestioningly celebrating his acquittal need to think more carefully about it. If he'd just sprayed a shitty tag on a major statue or public building, presumably you'd all think that was wrong and would deserve some punishment, even if small. Even if the paint were washable, if it cost a lot to clean. But if it's the content of the message that determines legality, as judged subjectively by a jury, we're going to have some dark acquittals in the future. The fact that a jury happens to agree with the message is not a good way of judging guilt and innocence. The principle of rule of law is that the law takes a certain amount of blindness to things, to prevent it being abused.
EDIT: If you're still going to reply please at least demonstrate that you have done that thinking. So far only one person who has replied in this thread has done so, which is a waste of everyone's time and quite annoying.