Hmmmm sure sounds like you’re dealing with UNETHICAL webmasters any way you cut it! AND for the record “SW” was brought up because I noticed a couple of people who utilize that type of marketing (scumware) complaining about someone else stealing content. BOTH are wrong IMHO and quite frankly the later is much worse – instead of stealing your content they are attempting to steal your players as well! Furthermore it was and is my opinion that those imbecils have NO right to complain about anything!
Personally I could care less about spamming search engines. Produce a quality site thats not all about getting users to click thru to a casino and you will rank. Sitting around complaining that youre getting toasted in the serps isnt doing anything constructive about it – go create some content and obtain some quality links. Wear your white hat and you wont have to worry about the black hat morons – they will fall in time.
I think you should be more concerned about the dirtier techniques being employed by your colleagues. Id love to see these folks come out and admit they are targeting YOUR sites and then see what becomes of the conversation!