If, for example, you call someone the N-word then I think you do deserve to get permabanned. You don't need a second chance for something like that, you already  know that making horribly racist and sexist comments is wrong. 

Because an user that is racist once might not be racist a second time??

And yet, they are still a racist and will have offended people on the site to a degree that is way beyond calling them say, a fanboy or a dickhead or whatever.

Why take the risk on someone who has already gone way out of the way to be racist once?

Why should a known racist be welcome on this site?

Doesnt matter if its once in 10,000 posts or once in 10 posts.

I want to address this.

Sometimes blanket warnings are given where no individual has reached the point of requiring moderation. Other times they are given because the Mod in question doesn't have sufficient time to hand out 3-5 moderations (each one takes a couple of minutes, and we all have jobs/families/lives). If that happens, the mod should either:

1. Come back later, or

2. Leave the mod reports in the queue so another mod knows to deal with it.

As for senior mods, already exists. Decisions can be overthrown by:

• Kantor - Head Mod
• Smeags - Deputy Head Mod
• Committee - discussion amongst a number of mods in mod chat (they'll generally wait until they've heard from the mod that made the original decision).

We're all in different timezones, so all of the above can take a while.

What would you say is minor racism?

Are you being racist towards the Mon Calamari?

I just don't see what his race contributes to the series

I dont even think that reaches "minor" status.