Since you asked and I’m bored, here’s my two cents:
KD - yes, you’re overreacting.
“I would love to accommodate you” and “I can take care of you” are hardly unique phrases, and there are only so many ways to word a response when the general meaning is the same.
That being said, as you correctly pointed out it does make business sense for you to try to separate yourself. If you feel people are stealing your material in the open threads, maybe try posting a generic response and following up with your next catchphrase in a PM to keep it out of the public view.