'Cause dealin' with taunt parties ain't ****in' fun, that's why. Ya don't win a 3v1 unless you pull lame bullshit like repeatedly takin' advantage of a scrub's vulnerability t' bein' gimped or just playin' really defensively. It's boring as all hell, ain't even worth the satisfaction of makin' 'em all disband their stupid little game in all their rage quittin' glory. I'd much rather deal with team attack off-abusing projectile spammers than taunt parties. 'Least half the time one'a the spammers ends up on my team so they can't pull their simple mode tomfoolery.
... Assuming there's one player who isn't a projectile-spammin' jackass, anywho. Which is usually the case.