Wikimedia Bugzilla is closed!

Disallowing it is not a good idea, because one may need to extend the block
period and/or change the reason for blocking the user for the records. But I
belive showing a message on the confirmation page that informs the admin that
the user is already blocked (and by whome, until when, for what reason) would be
very helpful.

See also the related bug #2044.

Showing a warning "this user is already blocked until <time>" would be very useful.

>Disallowing it is not a good idea, because one may need to extend the block
>period and/or change the reason for blocking the user for the records.

if he tries to expend the block period without deleting the other block, the
first block ending will delete all the others.

but well, I agree with the general idea, it's such a bother to have 3 or 4 times
the same name on the ipblocklist

I would suggest having the block form do a quick check to see if a block is
effective, and if so, return a quick confirmation - "User Foo blocked this
user/IP on XXX with the reason YYY" - clicking Block again would confirm the block.

If no sizeable objections raise their heads by the time I get round to it, I'll
implement this. Ideas? Feedback? Let's have it.

(In reply to comment #4)
> I would suggest having the block form do a quick check to see if a block is
> effective, and if so, return a quick confirmation - "User Foo blocked this
> user/IP on XXX with the reason YYY" - clicking Block again would confirm the
block.
> 
> If no sizeable objections raise their heads by the time I get round to it, I'll
> implement this. Ideas? Feedback? Let's have it.

Sounds like a good idea to me.

Yes, sounds very good, it has been discussed on fr.wikipedia admins' blog today 
after a user was blocked 4 times in a row. Full support from me, I don't see any 
drawbacks to this.

+1

For IPs, how should we handle conflicting autoblocks?

After many mistakes, I support the idea of a request for confirmation to any
blocking (IPs or recorded users) like Korrigan.

This was fixed a while back by Tim Starling in his blocking changes.