My main source for this is conversations I've had in IRC, but it's also been noted elsewhere.[0][1][2][3][4][5][6][7][8]
Also, apparently they have weird anti-piracy measures on their software... software which they stole from others![9]
If you want Hackintosh install software which isn't stolen, I suggest myHack: http://myhack.sojugarden.com/ (I'm unaffiliated with it, but I've used it and I've had it recommended to me.) Unfortunately, myHack is now proprietary, because the author has had their code stolen in the past. It is, however, freeware.
[0] http://prasys.info/2011/01/tonymac-seriously/
[1] http://www.reddit.com/r/hackintosh/comments/17cb3x/have_any_...
[2] http://gigabytedaily.blogspot.co.uk/2012/04/gigabyte-uefi-bi...
[3] http://forum.osxlatitude.com/index.php?/topic/626-d620-help/
[4] http://archives.somethingawful.com/showthread.php?threadid=3...
[5] http://rog.asus.com/forum/showthread.php?32906-ASUS-UEFI-vBI...
[6] https://news.ycombinator.com/item?id=8468789 (HN post, turn on showdead)
[7] https://twitter.com/Zackehh9lives/status/337548817513717760
[8] http://forum.osxlatitude.com/index.php?/topic/3593-myhack-vs...
[9] https://web.archive.org/web/20130215124559/http://tkware.inf...