"Possible infringement" refers to a situation where someone may be breaking a rule or law by using something without permission or in a way that is not allowed. Full definition
Besides trademark searching, preparation and prosecution of trademark applications, we also engage in consulting and counseling services, and render legal opinions pertaining to possible infringement of third party trademark rights. (harrisonlawofficepc.com)
Copyright protects you and your content against possible infringement. (notionpress.com)
It seems the BLM is interested that you do not leave a mess, trespass etc., they don't seem to have any interest in fair use and copyright or have any vested interest in protecting users of all and any types from possible infringement, guess BLM just don't think it's BLM's business. (law.stackexchange.com)