I agree (mostly). I always run into Trolls. I think we have a good way of dealing with them here. I am not worried about getting a large influx of "other-language" developers here for the very reason you state. But, I know when I was crossing over to Perl, I would have loved a site like this.
I did not start using Perl because Perl was cool. I started using Perl as a systems admin when I kept finding good tools written in Perl. Until then I thought Perl was a hobby language (1993) with not much value (as did most of the people I worked with). After someone (Ingo C.) showed us some of his tools in Perl, and how easy they were to create in Perl, we started converting.
People who are great programmers learn new tools. It is part of the job in many ways. I think a section on this site concerning professionalism would be good exposure for Perl programmers to other language users as well as just good for Perl programmers.
Yeah, the children will come. You are correct. Nodereaper will reap. But, I do not think many children will show up to a section on professionalism. They are not interested in it.Digiryde