Web Browser Compatability

When doing a website, do you think it's right to be code for only certain browser (ie the most used browsers like Firefox & IE (latest ver)) and to just say to other users of browsers like Safari, IE 5 , "sorry you cant use this site"

>>23
ACID2?  Firefox passed that a long time ago.  ACID3, thus far, has yet to be passed perfectly by Firefox.
http://en.wikipedia.org/wiki/Acid3#Browsers_that_pass