Stupid was probably the wrong word, but I know several people who started it and ended up deciding not to do honors in their second or third years. One of these people graduated from UW with a 4.0 and is currently at Hopkins.
At UW the honors program has a set of classes that you can take with other honors students to fulfill your general education requirements. A lot of the work can be considered intensive, but not rewarding.
If you have no AP/IB credits coming in, maybe you should consider it, but AP credits can cover a lot of your general education requirements which is really nice because it allows you more flexibility when choosing what classes you want to take. If you do honors, then you have to take enough credits at the UW to fulfill these requirements and you have to take them from the honors program. This can be up to ~40-50 credits of your 180 credits in your 4 years, and they may not be classes you particularly like and they will be an extra load on top of your science and math classes that you'll be taking as pre-reqs.
All of this is just what I've heard, so if I'm in any way wrong please anyone correct me.
I do have several friends who are in the honors program, but I had talked to enough people that I decided not to do it after I was admitted.
But as many people have said, Seattle and UW are awesome.