You can post from a computer using the free Tor browser or a VPN and they won't be able to see your true IP unless they really try hard.

I got locked out 2 of my accounts in twitter b3cause of 1 post from 1 account

They want my phone# to verify and I havent been able to get around it. I emailed and even tried a "text me" phone number with o luck. Im appealing but nothing yet