Here is one about YCT. The anonymous letter writer doesn't like YCT. Among the charges is that it teaches academic Talmud:
The Chovevei Torah seminary teaches their students about creatures called “Stammaim.” Who are the Stammaim? They are a mythical generation in the mesorah created by Dr. David Weiss HaLivni. He maintains that they wrote a flawed text of the Gemara because they misunderstood the Tannaim and Amoraim!The letter writer then goes on to extensivly quote from Wikipedia's entry on David Weiss Halivni ("Here is how an Internet encyclopedia describes it:..."). In addition, Drew Kaplan points out that this letter lifts verbatim from one of his posts.