A lot of people have already lost their G+ accounts and the funny thing is they don't know why.
G+ is in the testing phase and Google is accepting accounts with valid usernames only, yes no nick names, pseudo names or commercial names example: robert seo, sandy marketing, iceman, king kong etc.
Read Google+ Community Guidlines
So be careful when you register, make sure that your email id name is not a nick name or pseudo name. By following this simple tip you can save your Google Plus account from being terminated.
If your account is suspended, you will still be able to access it and also see what your friend are sharing, but you wont be able to respond or make any changes. To get your account activated you will have to contact Google using a online form which looks like this.