Tom's idea about doing something about Stop and Search is a really interesting one and seems to be taking root so I thought I'd throw some food for thought into the conversation.
For further inspiration, you could have a look at a show called
Postcode Criminals (2011–12)
http://www.dreadscott.net/works/postcode-criminals/ It's a collaboration between a London based artist called Joanne Krushner and a US artist called Dread Scott. The two of them worked with young people in Brooklyn and Liverpool and did Skype and Facebook sessions in which participants shared their thoughts with each other on being constantly under surveillance; subjected to interrogation by the police; or indeed, criminalised in advance by stop-and-search activities.
It's a good example of (a) how having friends and relatives abroad may well be useful - Skype is a great facilitator for project work (b) realising something in public doesn't have to be expensive or aesthetically difficult.
Scott went on to make a video called
Stop, in which he showed life-size, projected images of six New York and Liverpool young people, who recited the number of times they were subjected to Stop and Frisk/ Stop and Search policing. The young men depicted were aged 19 to 29. Here it is
https://www.youtube.com/watch?v=pNseZpt4-sc&feature=youtu.be
Here's coverage of the Liverpool show by the Guardian
http://www.theguardian.com/society/2012/mar/13/young-artists-liverpool-stop-and-search
And here's the story of Isaac Borquaye, a 24-year-old hip-hop and urban artist known as Guvna B, who was stopped and searched in
Brockley after the May 'riots' in 2014.
http://www.artslondonnews.com/2014/01/27/the-reality-of-stop-and-search/ The irony is that he'd been making a video called
Free https://www.youtube.com/watch?v=fr4q92xb93Q
As you're probably aware, S+S powers have been restricted since then. Police now need to have a specific reason for searching an individual, whereas under the previous system, they only needed 'reasonable suspicion' that a crime had taken place. But it continues to be controversial and John Tully, the Head of the Met police has claimed that the new S+S laws have badly impacted the police's ability to fight crime.
http://www.independent.co.uk/news/uk/crime/restriction-of-stop-and-search-is-a-victory-for-politically-correct-brigade-claims-police-leader-10500849.html
There's also an organisation called Stop-watch which campaigns against the disproportionate use of stop and search - it's got an interesting feature which allows you to enter your postcode to find out how stop and search was used in 2013/14 and a film made by young people on how to handle S+S.
http://www.stop-watch.org/
And finally, here's a Banksy piece that sold for quite a lot of money!
http://www.prescriptionart.com/products/banksy-stop-and-search-signed
Hope some of this helps you get thinking!