It depends on what the name is. Most people/companies who believe they have a legitimate/winnable case will simply file the dispute. They probably have a few people within the company to send these out. Just use your head.....there is absolutely nothing wrong with registering ANY name in the world. Read a few hundred WIPO decisions this month and you will be better able to filter-out these potential threats. If the reason you registered the name was because of their company, then make sure you don't go overboard with your infringing. If you had good-faith then use it for whatever you want.