dextor,What I have observed about trading at support & resistance, especially the major ones, is that price can swing around that area huge & fast for some time too. It can really hit you hard if you are caught trading against it. Example - If you think that there will be a bounce from support, and price suddenly penetrates through it huge, how fast can you get out? Handle123's video is a good show of what can happened. Stops might not help if you are filled at a bad price...
I understand fully what you saying.