Own your identity and your username or nick or alias or whatever you want to call it.
A new site named usernamecheck.com can do that for you. I actually secured rustybrick a bunch other sites. Note, the site is having issues, so don’t kill it by trying over and over again (like I did).
Securing your name is incredibly important for online reputation management. Trust me, this will be huge in the future. So do it now, so you don’t regret it later.