There is a glitch wherein despite being blacklisted, one-player setups, such as the granny one that is currently appearing, will not be blacklisted despite being listed.
The games serve no purpose, other than to clog up the lobby. Any one person games will be shut down, and a short ban from creating games may be given if a user continues to make games after given a warning.
Until this bug is fixed, please do not make any setup involving only one player. Thank you.