Suggestion: Rule against reposts.

[Gaijin]

The problem with that is, what if someone writes a tutorial on a subject I am familiar with, but theirs is badly written(Layout, spelling, grammar, some information missing/wrong) So I decide, as I enjoy writing tutorials, and know I can do a better job to write my own on the same subject.

Then what does the moderator do? Lock/delete the original one, which will undoubtedly piss off the writer as you are more or less saying "I like Vorfin more, and he is better at X than you"

Or lock/delete mine, depriving members of information/better information.

The best solution for this would be you send the author of the other tutorial your tut.
And he updates/changes his post with one big thanks to you for correcting it or making it better.

I don't mind if someone corrects or updates one of mine, but that's just me.