I am in favour of marketing campaigns, but I am not in favour of harassing people at every corner. It seems that the marketers have become quite wild. Could decentralisation help with this?
A more decentralized government would be tougher for campaign contributors or special interest lobbyist groups to control. The more centralized power in a state the easier it is for said power to be exploited or abused. We see this in dictatorships and totalitarian regimes, the centralization of power leads to abuse. Republics like the united states where power is more decentralized between a President, joint chiefs of staff, a senate and other bodies typically makes exploitation and abuse of power more difficult.
A more decentralized state, which was harder for special interests to influence, could lead to laws being passed which would do more to protect public privacy and regulate aggressive or invasive marketing.