Sadly some people tend to like humany misery and they are causing it delibearately. There is not much you can do in
EU if you take it to personaly but if you don't it's much easier. Here is what I do:
1) If someone brings a train of mobs to me while mining I kill them all or die if I can't. I can handle up to 10 small troxies or few biggers ones at the same time. Decay is a bitch but it is your small victory if he brings mobs to you and you survive while he dies (don't forget, not all mobes will go for you).
2) If someone is screwing you with decoys (example I had on CP) dropping them all around you you just change the dome or dome corner and ignore him. I once even globaled nicely off a mob someone dragged on me and I was poolite enough to say "Thanks mate, great teamwork. Would you be so kind to bring me some more mobs?"
3) Just leave for afew minutes. These guys live from attention. If you deprive them of that pleasure they will give up and move to their sad little rl corner to mourn.
It is major mistake to take it personaly and start talking to them. Trough that you are just putting more fuel into the fire.