Is it me or does nobody say thank you for their kid's presents after parties anymore. My DD has been to goodness knows how many parties since last year and only 3 parents returned a thank you letter. Maybe I'm being petty but I would always send a quick thank you to other parents who came to my DD's parties. They've gone to the trouble of choosing a present and sometimes they don't even verbally thank you, let alone put pen to paper. Am I being unreasonable to think this?