give me freedom or give me products

Several years ago my companero Mahalia suggested a one-size-fits-all way of subvertising billboards. In the style of the government health warnings on the bottom of tobacco adverts, run a poster saying 'WARNING: They're only after your money'. It'd work on well over 90% of billboards.

By the same token, this splendid graffiti on Top Shop in Southport could work across the town centres of the world.