He is just trolling and some people (including semisol) tried making related changes in core a few months back but failed: 
GitHub
set `DEFAULT_PERMIT_BAREMULTISIG` to false by Retropex · Pull Request #28217 · bitcoin/bitcoin
The default activation of the permitbaremultisig=0 option proposes an enhancement for the Bitcoin network. By refusing non-P2SH multisignature tran...
