I've been yelled at in MW4 for using unorthodox setups. For most of the time I played, conventional wisdom favored the "boat" approach, meaning you select a full rack of the same sort of weapons to make aiming and timing shots easier. Alpha strike dominated the logic of all the players (that is, the amount of damage done in an instant), and most mechs were as slow as the chassis allowed, loaded down with a full rack of ER Large Lasers (6 - 7 depending upon the mech used) or heavy LBX autocannons (anti-mech shotguns, mostly used in the city maps). I favored using heavily tweaked designs, often lighter than the competition, undergunned when it came to alpha strike. The result was while I generally lacked in alpha strike I could keep up an assault far longer, did more DPS and generally had something I could sling at any range. Eventually, when my Highlander configuration dominated game after game in a city using a "light" loadout of Heavy Gauss Rifle, Ultra A/C 10 and a trio of inner sphere Large Lasers (Generally such maps quickly degenerated into a 1:1 k/d ratio for the highest class of player, I was consistantly pulling 3:1 or 4:1 thanks to my setup which only delivered 60% alpha and 80% dps thanks to the fact I could start shooting earlier, keep shooting longer and always had a weapon ready to throw their aim off when their heavy autocannons were ready. The fact that I did my maximum damage while at the very edge of their range certaily helped) people came around and stopped complaining.
I was yelled at in Battlefield, accused of camping when I was, in fact, defending a point.
I was yelled at in Dawn of War 2 for carrying an assault all the way into the enemy base and wrecking it even when victory was all but assured for being "unsporting". The surrender button exists for a reason and after a bloody drive like that, there was no compelling reason to let them get their strength back when the score was still 400 to 300 or so.
I was yelled at in Dawn of War 2 for having the audacity to bring two squads of terminators into the fray, and then bringing down an Avatar (the eldar end game unit, lots of hit points, slings gobs of damage). When I politely pointed out that between my commander's terminator armor and power claws (200 requisition, 100 power for the armor, 70 requisition, 70 power for the claws) the assault terminators (600 requisition, 300 combat award points, plus 70 requisition and 70 power for their claws) my standard terminators (600 requisition, 300 combat award points, plus 70 power and 70 requisition for the assault cannon) I had spent dramatically more (1610 requisition, 600 combat award points, 310 power, to his 1000 requisition and 200 power) and this represnted fully half of my alloted army strength to his avatar's quarter it OUGHT to be able to win. He then asserted it was "cheap" and I pointed out that had he played better I wouldn't have the combat award points or the requisiton required to bankroll such luxury (very rarely can I pull out two squads of terminators - that generally requires my opposition to rarely take down a marine and resource domination). Moreover, I pointed out that he had all but lost BEFORE the terminators came out as he had been crushed time and again by nothing more than a scout squad, a tactical squad, an assault squad and my commander. He responded with the usual accusations of my sexual preferences and asserted he could clearly beat me 1v1. I didn't bother taking him up on his offer, since his fould mouthed accusations were irritating to say the least.
I've been yelled at in Tribes for being an utter badass with the scout armor, in spite of having a ping averaging around 400ms. People accussed me of aim botting, hacking and a whole mess of nonsense when the only factor in play was I simply spent hundreds of hours playing the game and had learned precisely how to compensate for such lag. It should be noted that, at the time, high speed internet wasn't terribly common thus there were as many HPBs as LPBs (high ping/low ping bastards). The former often favored the heaviest armors, the latter favored sniping. Few people ran scout thanks to absurdly low health, a selection of only the weakest weapons and the inability to carry more than two of them. But in a fight in the open, if you knew what you were doing, there were only two classes that could stop you - Burster (with rocket launcher, and then only if they were quite good) and a better scout. The first was uncommon at best, the latter was almost unheard of.