Three frames sounds excessive, but....
Most of you lot sound like a bunch of children! Rude children! Every web-site is different and has a different intent and amount of content. If the page is resized or in frames "just for the hell of it" then yes it is bad design. If one or two pages are in frames and the rest of the site breaks back out of the frames, then where is the harm in that? In certain instances it can be useful to have an image or a glossary term pop up in a small window. I find I almost constantly resize browser windows whilst surfing at home.... if these tricks are used sparingly and for a real/useful purpose, I am all for them. When they are used will-nilly, then I think it is a problem.
mecrosis: +1: I agree that websites not intended for the masses (ie LMSs and training sites) should be able to make use of frames, resizing, pop-ups and other generally reviled techniques, indeed most users of such systems get used to them and don't seem to have any real problems with them.
I hate it when my internet banking's first screen maximises the browser, the next screen then opens in a pop-up at about 700x400px. It seems unecessary and an example of poor design (ie they have a lot of room to play with and they mung it completely!). Check it out to see what I mean
www.boq.com.au, pretend you're a member and go to where you log in to your internet banking.... yucko!
There are far worse things on the web than a site that makes you click a button to resize your browser.
lesson over, kids.