Take these steps right now to halt the cyber squatters.
Have people go through you for authorization: Go through your domain name registrar and fill in a form that locks in authorized entities of your claim of other domain names. You can buy these names and keep them under your roof. It will provide you information to include, such as contact information, who should be contacted if someone wants to register your domain, the character string you are claiming (this must be an EXACT match), description of your current products/services, when you began using that domain name.

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Tosh
Dedicated Hosting

Ya these are not half measures.Don’t let cyber squatters shake you down and ruin what you have built up on the net.You have a small window to accomplish filling out an authorized entry form. Check with your domain registrar for time frame windows in filling out an authorized entry form Failure to enter a claim during a certain time frame means the registering entities will not check to see if there is an equivalent .com, .net or .org name. They will not check the IP Claim Service database. Meaning, you could lose your .info or net-version of your domain name.
Get the rights and the authorization to similar or like names to your main domain name!