My understanding is that you *don't* shift the problem by creating barriers. For example, when we banned semi-automatic weapons in the mid-1990s, those opposing the laws said that people just would find different methods. In fact what happened was that the overall suicide rate dropped because people didn't do that. Likewise, the erection of high barriers on Melbourne's West Gate Bridge has *not* led to an increase in people jumping off other bridges. This is in contrast to some other forms of behaviour society seeks to minimise (for example, drag-racers or drug dealers), who seek out alternative locations when there's extra attention on one area.