We are completely unable to predict what exactly `aggressive' may mean, because legislation may preclude some specific kinds of action, and because what today may seem `aggressive', tomorrow can be considered as just common sense and normal business practice.
As an example, we can think of legislative actions on the part of the European Commission and the national governments to give preference to open source solutions whenever they are technically feasible. Another interesting action could be the active promotion (by direct or indirect funding) of the development of open source alternatives to proprietary systems in those areas where it is identified that this is convenient (because of strategic, social or economic reasons). This would create an enormous market for open source consulting and solutions, improve significantly the skills of the European information technology work force, and probably increase the usefulness of information technology systems. Also, these measures should have some measurable impact on the import/export balance for information technology products, currently very biased against Europe because the majority of widely distributed (usually shrinkwrapped) software systems come from the United States.
In fact, the whole matter of the level of support that open source deserves is mainly a matter of betting on its future. If open source software is really going to change the whole landscape of the information technology industry, the support that Europe (or any other country) gives to it can only be transformed into more benefits. If open source is not a passing fashion, but is here to stay, the impact could be similar to that of Internet technologies during the last decade. In this case, the more radically that a society adopts it as a technological enabler, the more benefits that society will get from it. In our opinion, if the open source community becomes strong in any given area of the world, that area has a far greater possibility of competing in a software market with changing rules, and the society in that area can benefit earlier from reduced costs, greater economic activity, and widespread diffusion of new technologies.