Marquees render the dialogue box unusable. Visitors like seeing where a URL is pointing, or how large a graphic file is that is coming in, or what a button definition is for the tools that are being used. Marguees are not supported by all browsers. We do not encourage or support the use of frames. They are hard to create and maintain.
Some visitors have strong opinions about their difficulty.
Bookmarking is very difficult. Many search engines have difficulty when indexing. If done poorly, frames can cause problems. There are issues with printing, frame nesting, and opening new windows. If you are going to use tables to simulate frames, be careful defining the full page width.