Frankly, this fear just sounds too much like "Oh no, I'd hate to see anything tinge my precious baby!"
What's wrong with there being poorly written code in your favorite language? Unless these Lispers also do web development, they likely won't come in contact with the hypothetical bad Lisp-on-web code. So why should they care? Also, how is the good code drowned out? Assuming that the screening process for a job picks out good PHP developers, it isn't that hard for one to find good PHP code in the form of frameworks and libraries.
Well sure, to normal people yes. But to understand the mentality, just consider for a second that the OA is foaming at the mouth of a language that is merely inspired by LISP.
wrt the PHP thing, well, I cut my teeth on PHP, and frankly I didn't learn much by reading code I found early on. After doing it for a couple years (and completing an MIT-based CS degree) I started to discover the flaws for myself and I was eventually well-trained enough to be able to find the good code. If you know what to look for it's easy. However what's popular in PHP world (ie. what you find on Google) is not necessarily good. Compared to Ruby or Python, or hell, even Perl, it's just way harder to find good PHP code to learn from for a beginner.
What's wrong with there being poorly written code in your favorite language? Unless these Lispers also do web development, they likely won't come in contact with the hypothetical bad Lisp-on-web code. So why should they care? Also, how is the good code drowned out? Assuming that the screening process for a job picks out good PHP developers, it isn't that hard for one to find good PHP code in the form of frameworks and libraries.