trespasser on my 404 page

[thrillho]

Hi folks. I was just looking at my log files, and noticed that I had a number of 404 hits yesterday. I clicked on the referrers url, and found myself at my 404 error page, but with the addition of a different banner at the bottom of the page. My 404 appeared to be in a frame, with the new banner (I'm assuming it's a sponsor of the tgp referrer) on the stationary bottom panel. One url is

http://www.grannycookies.com/gal.cgi?p=40&o=p3.i017.1074654526&url=http://www.matureaunties.com/pages/101/104.html

The "grannycookies" domain is the tgp, the "matureaunties" is my site. There were six logged hits in this manner, each with a different banner on the bottom panel.
My question: Is this a usual practice or am I being hijacked? Is this a legitimate tgp owner's perogative?
By the way, I did look for an email address at the grannycookies site, so I could ask the webmaster about it privately first, but didn't find one.
Thanks for your help!
Lee

[DangerDave]

I hate gallery stealers... |angry|

I would just redirect them

RewriteCond %{HTTP_REFERER} ^http://([a-z0-9-]+\.)*grannycookies.com(:80)* [NC,OR]
RewriteCond %{HTTP_REFERER} ^http://([a-z0-9-]+\.)*someotherdomain.com(:80)* [NC]
RewriteRule /* http://www.somebadplace.com/ [R,L]
DD

[thrillho]

Thanks for the quick reply, DD! Upon further inspection of my logfiles, the six 404 page incedents were joined by close to 200 hits to my gallery page from the same url--with my gallery showing up in the same frame configuration, their banner on the bottom of each one. That code you provided is going into my htaccess page immediately! (that's where it goes, yeah?)

Thanks again!
Lee