Any plans on taking out Blockstack IDs with no zone files/ profile pictures? Users who didn’t add any info even name! Username Squatting? They are blocking the usernames and it’s impossible for others to claim
No! Even if we wanted to, there’s nothing we can do. We don’t control the names, the person who holds the name’s private key(s) is the only one that can revoke a name.
Blockstack ID ownership has the same characteristics as Bitcoin ownership. Just like you can’t take someone else’s Bitcoin without their private key, you can’t take or revoke a Blockstack ID without the private key or keys of the Bitcoin address that owns the Blockstack ID
For namespaces (like .id) that have an expiration date, one option is to wait until the name expires and then buy it then.
How does the renewal work? I already though that something like this is implemented, but when I bought my id, there was no hint on that in the CLI 
You pay the price of the registration to renew the name.
Is it possible to buy 2, 3, 4, x years?
Not at this time We could modify the CLI tool to automatically renew over the desired interval of time, however.
Is there a redeem period after a name expires in which only the former owner can buy it (again)?
Not in .id, but we could add this feature to the namespace rules so future namespaces could offer this.
Is this above technically possible?
Actually, we were going to add this feature for NAME_TRANSFER operations in Blockstack Core 0.15. Transfers will take X blocks, during which time the original owner can reverse it.
Is there a way to prevent name squatting with common words instead of short ids?
(i.e. blockstack.id and fmwq.id share more or less its price)
There are a few strategies we’re considering:
The namespace creator squats all the popular names preemptively (via NAME_IMPORT), and gives them out to their rightful owners at a later date.
We extend the price function to allow the namespace creator to set the prices of names on a per-name basis.
We modify Blockstack Core itself to reserve common words.
We implement an on-chain auction system for names. More research is needed to figure out how to do this fairly, so e.g. miners can’t interfere with it.