When you have little ones and you're about to leave them (to their own devices or with someone) for awhile, you make sure to verbally emphasize what you want them to remember/emphasize while you're away.

"Be polite" "Share" "Brush your teeth" "Help your brother/sister"

"I love you"

"I'll be back soon"

Although Q posted a link to "We're not gonna take it" on his way out, this was basically his final (typed-out, purposefully directed to) post.

It has way more meaning than most have inferred, imo.