1hr bans are totally out of the question. 7 days for me seems sufficient. That way it gives time for people to realise what they have actually done wrong, and time to miss it

When they are unbanned- maybe they will try harder not to get banned again.
Too much hassle for myself/ mods to ban someone, then an hour later come back and unban them.
Besides... who would really give a toss if they were banned from the chatbox for an hour?
I also propose a 3 strike system. After 3 bans from the chatbox- that's it.. your banned forever from it. I don't see why myself/ mods should need to 'nurse' members 24/7. If a rules made- it should be abided by. Fair enough everyone makes mistakes, but if you haven't learnt from your mistake after having 3 bans (21 days total), I don't see why staff should waste anymore time looking over you.
RE Selling something in the chatbox without making a thread- You then couldn't leave/ be left feedback as I have strict URL checking turned on, which requires you to provide a link to the sales thread.
The whole verification thing is there for a reason, and there's no way it can work how planned if the chatbox went back to how it was before. I just really can't be arsed with someone (unverified) coming to me and say "so & so ripped me off".
Another problem- as Ben says.. members could maybe feel pressured into forking out to get verified just to use the chatbox. I don't want to do this tbh as it's not fair if they only want to use the chatbox, but not sell.
Another thing- allowing all to use it- that's a hell of a lot more members to be keeping an eye on, and defining 'sales talk' in instant chat has in the past already led to disagreements between members/ staff, causing friction between them. So far I feel staff/ members get on rather well, staff don't 'bully' people, and in return- they are pretty much respected by everyone... I would like to see it stay this way.
Last point I can think of just now is- When the chatbox was here before, things were said by some members in the heat of the moment, which led to arguments. If the same discussion was happening in a thread- Maybe some of those things wouldn't have been said as you have more time to THINK before clicking the POST THREAD button.
Instant chat can get heated, and let's not forget just how many people we have using the site now. Not everyone shares the same opinions, or is able to keep their cool under heated discussions.
I'm probably one of these people- being a hot-head. However.. typing in a thread- I useually read it over before posting it just to make sure I am saying what I mean, and not coming across as a cock.
Although some of you might still think I'm a cock... but hey- Givea****