Well indirectly they might, if say loneliness is a limiting factor on your productivity. And as I implied apparently-to-subtly with the first post they probably do help in an absolute sense, it's just that there are more effective ways with less side effects to do the same thing with a subset of the resources needed for one. Again, this is just guesses based on an unreliable "common sense" more than anything.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.