I bought the RP weapon packs (years ago) before prestige weapons and most other weapon packs existed. Most RP weapons are mediocre at best. It would be great if weapon packs could be enabled/disabled after purchase. I feel the RP weapon packs hinder my chances of starting the game with more powerful weapons now that I'm higher level. I can imagine there would be other reasons people would like this ability. Maybe it'd give them more reassurance if they are deciding whether to buy a weapon pack (which cannot be trialled). Maybe someone would like to mix and match certain weapon packs, etc. But to feel penalised for buying a weapon pack which you paid extra for, is silly.