The biggest suspect of all is the Wegman Report itself. It rehashes discredited theories from McIntyre and McKitrick (and energy consultant and an economist), shock of all shocks, two unqualified individuals misunderstood the data they were interpreting, and a peer reviewed article proved them wrong. It also ignores the fact that the hockey stick is simply one of multiple lines of evidence. In the conclusions they also take the astonishing position that peer-review is one of the major problems with the field and that the people that study climate should not be the ones to write up the conclusions of the work! Peer reveiw is the foundation of scientific research. It is why Jonah Goldberg cannot publish his opinions on climate research in Science Magazine and it is why the conclusions of science are in a different (and much more credible) class than the kids over at the Corner. Joe Barton commissioned a hit piece and he got the Wegman Report.

Note:
mu.nu spam filters prevent me from posting the links necessary to support this argument. The links are here (peer reviewed article):
http://www.realclimate.ore/index.php?p=10
and here (evidence):
http://www.realclimate.ore/index.php/archives/2004/12/myths-vs-fact-regarding-the-hockey-stickquot/

but replace .ore with .org for each case and that will get you the necessary link.
There are people overstating the problem out of misunderstanding or political gain, but the effect is real. Simple fact.