Fake platoon members and double tags

Hello everyone,
there is a paltoon, whoch has been existed for a few years now, and I am also a member of it since some time. For a few weeks now, however, we have noticed that new players have appeared who have the same tag as us, but are not members of our platoon. How is this possible? these people are not really friendly and also behave rather toxic ingame. we are now worried that we will be banned from community servers and get a bad reputation because of the "fake members". can this be solved somehow? Is there a verification option so that a tag can only be assigned once?