I couldn't set up an account with my real last name (**bleep**), it's a bad word. Really???
PM plans are prepaid plan and no credit check. You can use any name if you like.
I suggest consulting with the moderator team to see if there is a work around. You can fake the account holder information. When you get to the payment tab, you can't fake the name there. The moderator team can be reached via private message using smartforms which is initiated by clicking on the ? on the lower right corner of the webpage or try using this link. The guided process will facilitate documentation of the issue or concern and the required resolution which will be submitted to the moderator team. Refer to this announcement link for additional details on smartforms and the ticketing system for moderator team interactions. If use of smartform brings no joy, then use the following direct link to private message the moderator team. Refer to the following knowledge base article for additional information on the moderator team.