Occasionally while healing WP or AK I'll run into a tank that doesn't use his enmity modifier (Shield Oath or the Axe buff thingy for Warriors) resulting in threat going directly to me. I do try to hold back, but there's only so much healing I can put off before people start to be in danger. However, when I ask (something along the lines of 'please use your threat skill'), half the time the tank or one of the DPS will either throw a fit or just drop. I understand wanting to do more damage to get through the dungeon faster and I understand trying to challenge yourself, but I don't want every trash pull in dungeons I overgear (not significantly as you can see on my Lodestone) to be a constant struggle due to someone else not playing as expected.
Am I being rude? Is there a 'good' way to ask someone to change what they are doing to make my dungeon runs a little easier?