serious answer: the only good reason I have ever heard for the wrangler being allowed is that engineer would be even shittier without it and it would just be too hard to find people willing to play it
trollish answer: every time people ask to ban it the admins act like massive cunts
http://ugcleague.com/forums/showthread.php?t=11833&page=6
start with my post on p. 6 and keep reading; once infinite comes in you know you've struck gold