I have three domains, the .com, .net, and .org, all the same name. The .com is my site domain. I have the .net and .org doing a permanent 301 redirection at the DNS level (HTTP redirection).
I did this to protect my brand. Now, I'm wondering if I should just park the .net and .org, or is it ok to keep them redirected? Does Google see that type of redirection as a negative ranking factor, or could I get penalized for doing it?