Well, I try not to tell folks their website name because they usually have something in mind or like it for some reason or another. Some may not like the name and I understand their reasons why.
JuiceAddict.com may give you negative thoughts at first, but I could actually see it being useful. All the negative stuff of course is about the word Addict. He could change it to suit most folks, but no matter what he changes it to will lead someone, somewhere, not to like the new name--LOL.
I say it is up to the site owner in the end because that is what they want. If you think about other successful websites and their names, well, some never cease to amaze me regarding their name. You think, dang I never thought anyone would use that--LOL
Yahoo, Google, Ebay, Mozilla, LimeWire, Gimp, etc.--really strange if you think about em.
Now it is even getting harder to find any .com name that has not already been taken that matches what you are doing, so you have to use different plays on the words.
And, finally in the end it is the website owner who is paying for it--LOL
When I do a website for someone, I may make suggestions to them and my reasons behind my advice. They can use it or not.