Aye. If you don't read posts, especially before posting in the IC, then you don't belong in RPs. We've had a problem in one of our RPs where one guy neither read IC nor OoC before posting IC. Suffice to say, his posts did not mesh well with the RP, and he did not take it well when he was told to clean up his mess for the sake of the other players. When someone reacts with "TL;DNR" to IC or OoC Posts with length, then they clearly aren't in the right RP.