As per Peej's suggestion, I have implemented a plugin that allows you to "sit" on stairblocks! Simply shift and right click! To exit sitting, right click the stair, walk away, or break the stair!
Remi, I love you for this and the other update. I will write a book for you, so if you have an idea, just name it. No matter how horrible it is, I will write it for you.