[theOZer]

FYI: Running V3.6.8. NYNMS installed clean and functionality is solid.
To empower the user, try this:
Create a Marquee On or Off option in the UserCP. Then wrap $marquee in an if tag that checks this setting.
1) Add UserCP Marquee On/Off button:
ACP / User Profile Fields / Add New User Profile Field
Title:
Marquee (pick one you like)
Desc:
Turn the marquee On or Off.
Options:
On
Off
wheel down to Display Page,
choose "Options: Other" (puts button in Misc Options)
save
In User Profile Field Manager, note under Name the field number, e.g., field9.
2) Then in the Header template wrap $marguee with an if tag based off the user's preference:
<if condition="$bbuserinfo['field9'] <> 'Off'">
$marquee
</if>
Change this example's field9 with your button's field number.