This is wonderful. It’s also true! Even when I was running a very small business and not particularly bothered by what people were doing that could be argued as

This is wonderful. It’s also true! Even when I was running a very small business and not particularly bothered by what people were doing that could be argued as resembling trademark infringement, I was urged to be vigilant about it because if you don’t defend your trademark, you risk losing it. That’s how the law works! If that really is the reason you’re threatening action against someone, they may just understand if you’re nice about it! That said, while it may foster more goodwill towards your company, it probably isn’t as surefire a way to generate the swift response you want as being a dick and making the threats