I think that RP is a lot more complex than to RP thoughts.
What is said in OOC *shouldn't* be used never by the characters, but we can't avoid this. I saw irc information being spread around IC as it were told by the char.
Thoughts, can never be known so as a description of something that happen far from everyone, but, many people just can't write well, some more can't interpret the writing even if it were from a good writer, and another bunch don't care for RP enough to not use it as a weapon or as a tool.
Another problem is about what should or should not be RP'd.
Why do one need to RP thoughts?
To make sure all the others understand that he/she didn't like it?
Thinking about this, I need to confess I did this once or twice.
If we think about why we are doing something, most of the times we will not do it.
RP is not different.
My advise would be: think twice on *why* you need to RP this or that to be sure is necessary for the understanding of your character.