SNIP
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>My point still is this ... legal action was a ridiculous response to the problem.

Personally I wouldn't call a letter from a lawyer "legal action".
I saw it as a formal letter with a warning of legal action if warranted. Who knows, maybe more direct communications were tried and were fruitless. Maybe it was felt that using a lawyer would show the gravity that the company attributes to the action(s) that precipitated the letter.

cheers
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SNIP