Mainly because they appear in the Hot UK Deals blob box (on the rightthand of the screen) for everyone to see. http://www.bitterwallet.com/commercial-break-japanese-sell-?rags-via-unsettling-demon-baby/26464
(BTW link won't work as I thought I'd better removed offending word)
I'm not complaining about the swearing on Bitter Wallet, its clear that is acceptable on BW however it has also been made clear that swearing is not allowed on Hot Deals.
I'm sure if I used the ?rag term on Hot Deals it would be classed as swearing (and justly so), its just a reminder that if you do put a swear word near the beginning of the title of a BW, Dealspawn or Playpennies article, its going to appear on Hot deals