Helps if people are writing about something interesting, or try to be funny or like have conflict and also don't outright suck at writing. Because being honest nobody wants to read, especially if it's long, if it has no conflict. Meandering is not fun to read about, no matter how pretty your purple prose is. It also helps when people are on the same page. Don't do page long collabs if you don't tell others what it's about. But [b]yes[/b] people should read the posts if they join a RP. [b]Especially the GM[/b]. :/

However, somebody mentioned failing to miss a detail or not respecting the CS. So I may offer a counterpoint...if it's something minor and can be easily roleplayed out of, or is something maybe understandable for their character to not know. (player knowledge and character knowledge should be different.) Don't start whining about it. Doesn't do anything but waste time. I've seen so many unnecessary rules (or straight out unwritten rules) for CS's that constantly get selectively broken anyway. That when I see someone nitpicking about it, they almost always come across as a hypocrite. Personal experience.

I've seen plenty of unnecessary nitpicking that would drive me crazy in most scenario's. Fake example of something I've seen something like it several times. A character tells a 2nd character whose eating "I see you're eating chicken, I like that too." If you wrote that you ate lettuce in your last post. You don't need to bitch incessantly in OOC that you're character is a vegetarian and they should know that (they don't, the character just met you.) and blah blah. Just write "Need to check you're eyeballs, this is lettuce" 2nd character said. Crisis averted.