I can't publish my blog to the name that I want.
Another blog is using the same name as mine!
Someone is impersonating me!!
Some of these complaints are reasonable - and could keep a team of judges and lawyers very busy, for a while, when properly reported.
Other complaints come from people who don't quite understand what identities in our Blogger blogs are uniquely our property - and what identities are not uniquely ours.
When you first setup your blog, choose the address with care.
When you setup a Blogger blog, one of the first things that you must choose - and choose carefully - is the blog Address. Once you have chosen the Address for your blog - and until you successfully give up this Address, the chosen Address is yours, for eternity. Nobody else can use this Address, in publishing their blog.
You can change the Address (also known as the URL) of your blog, whenever convenient to you - but any change that you make is subject to availability, based on Addresses which may have been chosen by other people. And it is worth your while to plan any Address change, carefully.
Your address will be unique - your template and title may not be.
When you setup a Blogger blog, and choose the Address, you also choose a blog Title, and Template. Anybody else, setting up their blog, may choose the same Title, and / or Template.
Many people will choose the same Template as you do (and later customise their template, using the Template Designer). Similarly, anybody is free to choose any Title (and later change the title, whenever convenient to them).
A blog which simply uses the same Title as yours is probably not Impersonating you. A blog which contains content scraped from your blog, and with the same Title, may constitute Impersonation.
Contrarily, a blog which simply contains content scraped from your blog, without impersonating, may constitute a copyright, or DMCA, Violation.
Conflict, between you and other blog owners, is not impossible.
The Internet, in its ability to bring people together, is going to cause conflict. Some conflict will come from many different people, simply not understanding other peoples lifestyles and traditions. Other conflict will come from people intentionally abusing you.
You need to understand the differences between the various abuses, before attempting to report any perceived offense. You are responsible for reporting any offense to the right agency.
It's up to you to report impersonation, copyright violation, or other abusive content to the right agency - and it's up to each individual agency to decide whether or not to act upon your complaint. You must report any problems properly, for any action to be taken.
Comments are your responsibility to allow / approve - or not.
Comments, posted to various blogs, are handled differently. Blogger / Google considers comments published to blogs (and not dismissed as spam) to be a freedom of speech issue. Comments are jointly the property of the blog owner, and the publisher of each comment.
If someone else, publishing a comment, offends you, that is a concern which can be handled only by the blog owner. Blogger / Google, without a court order, will not get involved.
If the blog owner permits anonymous comments, anybody can use any identity that pleases them. This may lead to apparent impersonation - but any impersonation conflicts will be up to the blog owner to resolve.
The bottom line here is that some Blogger / Google hosted problem content may require discretion and patience by you, for you and other people to receive appropriate treatment.
Your Blog Address Is Unique - Though Many Other Identities Are Not
Your Blog Address Is Unique - Other Details Are Not