Unreliable search engine optimization advice can, unfortunately, be found anywhere.
Bad advice can read in the postings on the various Internet search engine optimization message forums. Prior to accepting any poster's advice, be certain to read the board postings on a regular basis. Soon, the reliable and knowledgeable posters will separate themselves from the less helpful members. The ability to tell the good from the bad can only result from experience with reading the board.
The daily email will often bring pleas for money in return for dubious SEO services. Many offer services that are either worthless or even non-existent. No one should purchase SEO advice from email solicitation without a thorough examination of the sender's credentials and background.
Many websites host SEO articles that range from very good to so bad that they are dangerous to your site's search engine status, if implemented. If a site contains even one article that is extremely bad, be wary of all advice offered on that site.
Bad search engine optimization advice is available everywhere.
It's a truly buyer beware world out there on the Internet.