So I tried this and it was freaking hilarious.
1. You are going to have to have both Polaris AND Supernova, or the 4* versions. Shouldn't matter...
2. Start spamming a Polaris to hit monsters into your teammates and try your hardest to get a reaction out of them. If they are silent and don't care, then it is not as funny. Your goal is to get them to tell you to stop spamming Polaris.
3. make sure you are PUGGING (don't do this to guild members or friends or people you don't want to get a bad reputation with unless you already have a bad reputation) and make sure you are the party leader ofc.
4. 7/10 times you will get the reaction "stop spamming polaris". Now it will NOT work if they say "stop spamming" or "stop knocking things around".
5. Let's pretend you are lucky and they said "stop spamming polaris". Say, "ok, I am very sorry and I was not paying attention. I will no longer spam Polaris".
6. LET THEM SAY "THANK YOU". (or emote /thanks whichever). They might not, but if they do, it gets better.
7. Once you get the opportunity, switch to Supernova and continue to knock monsters into your teammates. DON'T SWITCH TO SUPERNOVA TOO EARLY! WAIT UNTIL YOU APPROACH MONSTERS or it will kind of give it away.
If you have swordsman experience this helps. You'll sort of understand the DA / brandish charging patterns, and know how to perfectly mess them up at the right time.
tip on spamming a pulsar: Aim the explosion a little to the right and left of monsters. this way, they are thrown a little unpredictably to the left or right. Make sure to be across from your teammates and not be side-by-side, making it much easier to annoy them.
Shoot and pause, this way it is sort of like a constant stream of explosions instead of 3 and a break, 3 and a break, 3 and a break.
Instead, shoot 2, pause a little, shoot 2, pause a little.
Congratulations, you just proved gunners can be [persons of unpleasant disposition] too.