A friend and I used to play Warcraft 3 (and Frozen Throne) waaaaay too much.
At some point - when we hit the extremely high ranks (Top 10 2v2's and stuff), the game became tedious. Obviously at that level you need to practice, focus on your APM, get build orders down to an Art etc. We just didn't have the time/skill for that so the game became weird. We either got into a match against just regular 'good' players and smashed them... or got into a match against high level players and struggled - often having to read smug messages and general douche bagginess during/after a match.
To make the game fun again - we just started doing crazy strategies - most people who played the game would probably recognise them. Tower rushes, 2v1 pooling resources, turtling and rushing wyverns/chimera... stuff like that. I'm reasonably certain that we (my friend and I) either invented, or played a large part in popularising 'Mass Moon wells'. Probably one of the more 'scummy' tactics.
You both choose Night Elf - get your Hero out asap (depending largely on what they chose - but either Demon Hunter or KOTG were great choices)... and then you just built tons of moonwells in formation. You effectively forced them to tunnel or break formation to enter your base, and your hero, along with more than enough healing and mana at his disposal could wipe an entire army over time. It was frustrating - often enough to get messages from the beginning. Then you would just spread across the map and try to expand etc. Meanwhile, you make a creative whole somewhere and get your air units pumping. At some point your hero wasn't going to be enough - and most good/great players would rush siege units to destroy moonwells from afar. Realistically, if you were good at it (and we were) you could get an air unit up before they could get a siege unit over to you. Then you just played decoy with your hero. Give them a run around, distract them, while your air units just go and wipe them out easily. We saw massive rage because of it.
However the worst thing we started doing was uprooting our Tree of Life (first building you have, and they have to destroy it to win the game). Walking it carefully somewhere, and eating trees - planting it as steathily as possible in the woods. The best case scenario (for the enemy) was they had to spend ages (sometimes an hour or longer) combing the map looking for your Tree (we often had multiple if we could sneak some resources away) while they abused us. Worst case - they'd just give up and we'd get a free win. There were matches where we should just start with... "umm, got a glitch guys?" "we have no units, can't build or do anything please help". They'd practically be begging us to just quit and stop wasting time until we'd change our tune to "no englais" and the like. It was griefing - and while I don't necessarily regret (we laughed alot) - it was a douche baggery.
