With a shared MPD server, sometimes other people will add shit music. Stop the rot.

mpc-guardian.sh

#!/usr/bin/env bash

# Given a blacklist file with one pattern per line, automatically removes them from your playlist
# To nuke an artist or song just do something like:
#
# echo Nickleback >> /var/music/blacklist.txt

BLACKLIST=/var/music/blacklist.txt
MPD_HOST=localhost

[ -f "$BLACKLIST" ] || touch "$BLACKLIST"

while :
do
    mpc current | grep -i -f $BLACKLIST && mpc del $(mpc status -f %position% | head -1)
    sleep 5
done