None of what you say is true, relevant or even reasonable. This site, as well as the SMF site (or IPB or phpBB or insert your favorite interactive script here) caters to a lot of new, inexperienced administrators. They come here looking for knowledge, experience and advice.
A newbie may be tempted to look at these little script tidbits and add them, just because they think it might be cool. The opposing view is also needed in something of a pro & con format. It is the reason message boards exist.
Pro: That Hummer H2 is sure a cool vehicle and it is extremely capable offroad!
Con: It gets abysmal fuel economy and only seats four comfortably.
If you cannot take the cons, maybe you need to write a book instead, then not read the critics' reviews.
If the newbies don't get the cons along with the toys, they are doomed to make the same mistakes many others have made. In this case (granted, my opinion), putting Amber Alerts on your site does nothing positive. The cons outweigh the pros. My intent here was to put forth some of the cons for the newbies to consider, as well as a suggested solution, before blindly throwing up some code.
By the way, the code you posted is readily available at Amber Alert sites and has no real tweaks for TP or SMF optimization - therefore your reasons for posting it here are questionable, at best.