Its not necessary to add this in F6 panel, its easy to look for group's graffiti by doing the right command. And the panel is already full and it makes confusion to the other player, even now the panel changed and has a lot of boxes to click.
I don't see enough reasons to add this to the F6 panel, you can do /graffiti and you will see how many graffitis your group have... I'm voting negative
You are wrong bec. not button to see graffiti only put name and numbers howmany graffiti in your group or squad like thisGraffiti: 3