Elon Musk has said verified accounts on Twitter which change their name to impersonate others will be permanently banned from the site. It comes after several celebrities in the US changed their Twitter name to “Elon Musk” and posted messages parodying the site’s new owner before their accounts were locked or suspended. Over the weekend, Twitter said it would allow anyone to get a verified blue badge on the platform simply by signing up to the Twitter Blue subscription service and paying a monthly fee, a move criticised by some over fears it would allow any account to appear legitimate and spr…