Not WGT's or anyone else's job to protect me from sharks. Plenty of sharks in all the challenge formats but they have stopped them. All other game formats have a challenge option.
If me and a friend of mine want to throw caution to the wind and jump into shark infested waters than that's our prerogative. We know the risks as well as understanding that you are putting your credits in the hands of your partner as well, as they could have a bad day or shot that costs you the match and your cred. Can't see this being a good thing for random alt shots, but if you have a handful of partners that are friends of yours and you play with frequently I don't see there being a problem
i do and always have liked the idea