Akshuly BWL - in my area because of the cruddy soil, the "code" says at least 1/3 of the post has to be in the ground. You can make a 5' fence, which is the maximum allowed by my city without a variance, with an 8' post, but even then the post is only up to the top crossbar, with the facing boards extending above.

Those who want a 6' fence can usually get the variance for a back fence close to a street with "noisy" traffic, but they need 9' (usable but hard to find) or 10' (obtainable for a price) posts.

As to a mudcat post, long paste jobs are deprecated, and may be subject to editing. Lyrics should be posted for collection if they're of an applicable sort. "External sources" that can be expected to be available for a while should be linked, with a description of the content and and personal observation/comment as to why it's significant.

For original thoughts, there seems to be no formal limit, although it should be understood that many people make it a practice to ignore long posts. Some of us probably wish a few people would coordinate "end of typing" a bit better with their "end of thinking," and quit when they've run out of ideas, but ... .

mea culpa

John