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"

>>42
I haven't made a new thread on /prog/ in months.  On the same hand, I don't initiate Thread Necromancy (or meme spam) either.
Just thought I'd bring up ACID3 and see if anyone really had something to contribute since an otherwise useless thread would waste space on the front page for a while anyway ...