Right.

But lawyers are prone to using scary phrasing, even if that phrasing has no bite, and are free to write strongly-worded letters.

"I see that you've been publishing the privately-held, trade secret tomato processing technique I developed -- on the Internet! Now, tomato processors everywhere can see it! I'm really pissed! I demand that you stop doing this immediately! In fact, if you want a full enumeration of whar I really think about the terrible things you're doing, then I further demand that you pay me $25,000 for that effort!"

...it's got no bite, but it's a letter. It can be drafted and sent.

(It can also be ignored upon receipt.)