What do you lose if some players don't take Perception proficiency?

[RickAllison]

I generally brush them off with the ignore function. It works beautifully.

I have a few that I have tried that with, but you run into threads where you simply have to listen to them because the contributions from actual posters are responding to said posts and it is best to establish context. Also that if I don't read the posts, then how will I spot the ones breaking forum rules so I can report them? Reporting is unpleasant, but a necessary evil to make sure the forum remains the idealistic bastion it sort of is.