When there is a lot of spam in an area of the forum, what we should do is report it and ask the moderators to delete it. It shouldn't be asking to end merits.
aside from infofronts light touch, WO is a more or less a moderator free zone per theymos
Yes, I think that WO is moderator free and I think theymos allowed it to be that way for some reason. If someone reports the posts of that thread then the moderators won't be able to delete those reported posts because none of them have the authority to delete any posts at that thread. I may be wrong but that's what I have noticed so far, and I also believe that the merit sources that are meriting the posts at that thread are well aware of their responsibilities and theymos knows about that thing.
I'm more than sure that theymos won't disable merits on that thread because some of the most reputable members of the forum only post in that thread and if merits are disabled from that thread than those members may not get merited for their contribution. I also believe that if newbies get merited in that thread than there is noting wrong with that because if a newbie is active in that thread and is participating in that thread then he/she will most probably get some merits.
I know that merits farmers may find that thread an easy one to get merited, but I'm more than sure that those farmers will have to put a lot of effort to receive those merits that they're trying to farm, and yes the merit farmers will always find other boards or threads to get those merits. We really can't stop all of those merit farmers and that's a bitter truth.