I think you might be worrying too much. Unless german customs is a lot stricter than US customs you should be fine considering the fact that I have successfully bought a small pile of illegal laser pointers from dealextreme.
Here is what the laserglow website says about customs.
Will my laser get seized by customs?
We get asked this question a lot so we feel it is important to address this. We can certainly understand the apprehension our customers must have about ordering a product from another country. This is why we do everything we can to ensure all our products meet the safety and regulatory requirements of all the countries we ship to. Because our business relies on international customers we cannot afford to take chances. This is why we consult with our customs brokers, who have in-depth knowledge and extensive experience dealing with customs agencies in North America, South America, Europe and Asia, on a regular basis.
We are proud to say that we have a 100% success rate with customs clearance because of our strict attention to safety and protocol. We are so sure of our success that we offer a 100% Money Back Guarantee if for ANY reason your product cannot be delivered to your door, no questions asked.