I generally don't contest but on occasion will participate for an hour or so max, and that is only on CW. I once did this making probably 50 contacts maybe a little more. Some time later I received emails deploring me to submit a log explaining how I am screwing the other contesters. I received this email a few times, no I never complied. So IMO to say it's NOT frowned upon isn't true, for some anyway. If it IS true, why did I get such emails?