[rwmj]

Someone tried this with an open source project I ran called bitmatch (now bitstring: https://ocaml.org/p/bitstring/latest/doc/Bitstring/index.htm...). They were running some scanning software that matched bits inside binaries, and felt they could threaten anyone who dared to use the word "bitmatch". Trademarks don't work like that since they only protect a narrow field of endeavour, not "no one can ever use this word".

They sent the C&D to my employer which made everything much more complex. I usually would have ignored it, but my employer's legal department was on my back about it, so I renamed the project to bitstring. For years my project was still top of Google search for "bitmatch". (I tried it now and I notice it's a different, Rust project, so the guy still didn't win in the end.)