Of course previewing a post is important, but in the six years I've been a regular of this forum, I've never noticed any huge ongoing issues regarding broken links. Incorrect grammar, spelling and the usage of internet slang (which is supposed to be off limits) has actually been the bigger annoyance. Considering that this forum is, above all, for educational purposes (it has been used by students) the clarity of a post is more important than any broken link. But let's not get too off-topic!