Yes, definitely a donkey line for the most part. There will be times when you get lucky and win, but try not to remember those as success. They will be far and few in between. I personally don't believe in getting into a war with a LAG with only a bare King high. It can be done, but requires such a tremendous read and it so rare that I wouldn't recommend it at all.

If you think there's a chance your King high has some showdown value (which it will sometimes), then get there cheaply. Any other method is usually spewing.