Because pet peeves are pretty common on sites like this, I try to minimize my petty complaints. I know I mostly fail, but I try.
My pet peeve today is about searching for and booking hotels online. Having done a lot of traveling over the past few years, and having booked most of it online, I’m an expert. If you know the name of a hotel, and want to check it out, try and use Google to find it. Instead of getting the site for the hotel (or motel or bed and breakfast), you get a wasteland of accomodation-booking middle-men (middle-sites?). Few of these sites actually link to the accomodation, because then you’ll just book with them directly and the hotel merchant will lose their commission.
Today’s example is the Hampton Inn, where my step-mother is staying while she’s in town. I searched for it in Google, and came up totally empty. The rankings work this way because the hotel middle-men work very hard at search engine optimization, while the hotel itself wouldn’t know SEO from SOS.
Fortunately, I’ve solved my problem. I use the venerable Yahoo for hotel searches, and things generally work much better. This phenomenon is on my mind because I’m building a site for a friend who has a newly-opened villa in the south of France.
DarrenBarefoot.com 
I have had this experience before as well. Not only does this phenomenon frustrate any attempt to see how the hotel presents itself, the misleading links destroy any possible trust I could have for the broker sites, and there’s no chance I’ll book with them, much less tell them my name for fear of unlimited spam.
If you haven’t already, complain to Google when your search comes up with a bunch of bogus junk sites (link farms, middlemen, resellers…) as top hits.