It wouldn't be unreasonable, since all but newbs perfect these straight away. The one side-effect is that you'd lose the experience from the skill improvements. Also, you might find that felar (say) don't use 2 practices on each skill. Neither of these is a big issue though so I don't see why one wouldn't do this (and same for camo).

The nasty alternative would be to make them harder to improve in (e.g. put a timer on how often they can be improved, but then up the likelihood of improvement), so spam becomes something that you wouldn't necessarily do.