repitition of views in forums

Many members are writing comments in forums even though they have nothing to add. Merely saying that the information is useful or just repeating the comments of some one or saying that this is okay and I agree- do not meet any purpose. These types of material only give some points without serving any purpose. If the intention is just to than some one, it will be okay to click the 'thank you' button and give extra point. Also, 'Karma' can be increased.