Avoid "Best viewed in... " lines on web pages

I have read this line on many websites: "Best viewed in 1024 X 768 or higher resolution" and the surprising part is that many Website Designing Company Portfolio web pages have these kind of lines on it.
In my opinion its not at all a useful hint to users rather its a synonym for poor design practices.
Such lines makes the user feel that such website is not useful to a him/her in anyway if they are using old monitors that does support resolutions upto 800 X 600 and not higher.