It's not entirely unprecedented to have a recommendation tag on a Stack Exchange site, but it is rare:
The latest question currently is:
Bulletin Board System with tagging, email notification
Which isn't so much "looking for a script" as a general "what should I install on my webserver to do X?" shopping recommendation.
Browsing around the looking-for-a-script tag I think these are borderline, but I don't feel strongly enough about them to effect their removal. At least the nature of the question does imply the audience is correct: if you control/operate a webserver, then you would have the ability to install scripts and applications on that webserver of your choice.
As long as this tag doesn't dominate the site, and the questions and answers are generally useful to some subset of pro webmasters, they can probably be tolerated for now.
But if they are low quality or useless, of course they should be removed, as per usual. This tag is not a magic inoculation for poor quality, either!