Because certain placeables take priority over the “Press F to interact” function, people have always been able to use merchants, boxes of fun, bobblehead factories mess the community a bit. Usually by placing one over a world boss chest, or in SW chest trains someone might place one at every chest.
But then this happens: http://imgur.com/NFrBkzR
The image is of one of three keg spawn locations for the cobalt wurm at Triple Trouble. In placing a merchant down 1 person was able to destroy the final keg run during the syncronized Decap. this is just one of many ways that Triple Trouble can be destroyed by this.
Now the people who place items in these locations, usually never do this with this intention in mind, so it really falls down to a mechanical issue.
Placeable items should not take priority over event functions or chests.
I wouldn’t say this is an urgent fix, but it really needs to be looked into, especially in the case of Triple Trouble, since more groups are doing the event now, attracting all players of all types.