My server runs 100% pvp so if a tribe is blue tagging it's up to the ones who are getting blue tagged. Maybe next time they'll pick better alliances. If the probablem is on going I.e more than once the tribe responsible gets tribe wiped by admin command if they do it a third time they are removed from the server indefinitely
The way I see it admins are there to make sure the server runs smoothe and do events and stuff, and sometimes help people out of an ark glitch other than that we're not their to hold hands and coddle the tribes on the server. My server does enough coddling by giving out starter kits