I agree this would be a nice feature to have. In the meantime, you can use the RequestPolicy add-on in order to block cross-domain requests to G+ in your other

I agree this would be a nice feature to have. In the meantime, you can use the RequestPolicy add-on in order to block cross-domain requests to G+ in your other tabs. In this case, NoScript won't even be needed because the script won't be loaded at all.