Unintentional Hyperlinks

While commenting on Kaitlin’s Post Secret Blog, two phrases were hyperlinked, although I did not intend to. It made me wonder if all blogs or comments automatically pick up on certain phrases and hyperlink them to certain websites, and if anyone else has encountered this problem. It made me feel weird that bloggers may be blogging about something, and hyperlinks are put in, without intention or their knowledge. One phrase was “find someone” and it linked to a match-making website- a sneaky way to advertise I think, and also unethical- any thoughts?