Opinions sought - Company product site with accidentally revealed code

Hello Experts

I have just been exploring the "Belcat" website checking out musical instrument related products and was on the verge of contacting them about some specs of a particular product when I discovered some code that seems to have been accidentally revealed and makes me highly suspicious.

http://belcat.com --> directs to http://belcat.com/2005/main.html (turn volume down, flash intro).

Click "Product" link and then "Amplifier" links.

It opens on Page [1].  Click on the link for [4] below the two rows of image links to bypass the normal pages.
Observe the unfinished item at the right of the bottom row of images with the white "All Wha...".
Click on it and notice that it opens a page displaying the HTML code that we obviously are not supposed to be seeing.

http://belcat.com/bbs/view.php?id=belcatproduct2&page=4&sn1=&divpage=1&sn=off&ss=on&sc=on&select_arrange=headnum&desc=asc&no=77

Note the "bbs" in the URL.

The content clearly includes Google Groups links to "Buy Cialis/Viagra/Tramadol, etc Online", bust strangely below the code there is what would seem to be two links to go to the Previous amplifier model number "FX2030D" and to the Next model "FX2020D".  The links are functional, so it's like this revealing partial code from a web page has been accidentally crammed in and visibly indexed by a link.

Go back now to the page linked to as [4] and then click the link to load page [5].

http://belcat.com/bbs/zboard.php?id=belcatproduct2&page=5&select_arrange=headnum&desc=asc&category=&sn=off&ss=on&sc=on&keyword=&sn1=&divpage=1

Note again the "bbs" in the URL.

This has a single row of "images" with the amplifier model number "FX2020D" shown by image in the rightmost cell, but the 4 cells to the left of the image are like the "All Wha..." link visible on Page [4]:  "best ph..."  "Online ..."  "Cheap V..."  "yhdpkjv..."
No prizes for filling in the missing pharmaceutical name in "Best V...".
Each one links to the same kind of partial HTML code listing cheap insurance, drugs, weight loss stuff, etc, etc.

The weird thing about these "product pages" is that they have "Copyright 1999-2009 Zeroboard" (http://www.zeroboard.com/) at the end of the page, and it's perfectly obvious by the http://belcat.com/bbs/view.php and http://belcat.com/bbs/zboard.php parts of the respective URLs that these aren't standard pages.

There are also "button" links to "List", "Modify", or "Delete".  The "List" link just takes you back to the thumbnail images.  The "Modify" opens a new page with some Chinese text and a "Move" button.  I haven't clicked the "Delete" link.

Do these links look like ones intended to only be available to the web master?  They don't appear on the normal pages with the thumbnail image links.

I would be grateful if some of you experts could give me some educated guesses as to whose content that advertising-related content is.  Does it appear to have been created by belcat.com, or could it be an accidental overspill from "zeroboard.com"?

Remembering that I was about to click the link to "Contact Us" and ask for spec on a product, I am now very wary about doing so in case I end up being subscribed to some bulletin boards and/or spammed with Viagra and Cialis offers.

If the content does appear to have been created by belcat.com (Chinese based) for their own ends, then they will obviously hear from me very loudly as will as many musical instrument retailers I know that they sell to.

What do you think?

Thanks in advance.
Bill