If your domain is trademarked, you'd be protected if something like this happened to your company. One bad impression can quickly snowball, and it is important to stay on top of the situation. Try
If your business is primarily (or exclusively) an online enterprise, you should definitely consider trademarking your name. For example, Amazon.com and Yahoo.com couldn't even conduct business without their domain names; their domains are their business names. If this is the case with your company, give serious thought to securing it as a trademark.
Trademarking isn't cheap. Expect to spend anywhere from $350 if you fill out and submit your paperwork yourself to more than $5000 if you hire an attorney to take care of it for you. You'll need to determine whether or not this is an expense you're willing to incur to protect your domain name.