Where's that "dead horse" emoticon?
My opinion on Cold Steel is that they make some tough knives, some for fairly reasonable prices. They also make some mall ninja and novelty stuff.
Some people say that they steal other manufacturers designs. I have only found three examples- the Canadian Belt, which is a clone of Grohhman (I think). The Canadian Belt is $15, where as the Grohhman is around $150, so I don't think they are doing any harm to Grohhman. The second is the Kudu, an Okapi clone. They reference the Okapi, not by name, but by description. Personally, I prefer wood and carbon, but other people like polymer and stainless. They did the same thing with the discontinued Twistmaster, an Opinel clone. Again, I don't think this is doing Okapi any harm- the people who want wood and carbon will but Okapi, while the people who want stainless and polymer can get the Kudu.
Third one I know of is the GI Tanto. It's a Strider design, I'm pretty sure. IMO, copying Strider isn't a sin, crime, whatever what have you.
I think a lot of the CS hate stems from Lynn Thompson, their owner, who can be a bit of a loudmouth.
I also think a lot of the CS hate is misplaced. I would buy CS over Ontario (RAT cutlery)
Strider (lying) or Mantis (spamming).