I haven't been using Abrosia for a couple of weeks (literally no time). I usually pick up 3-4 mps a day on 3 different shell accounts (9-12 mps a day)...I did that for about two months straight and haven't seen any of them iced but I do get restock banned on them daily (I do use a different proxy for all of them)....
Then again, about 3 months ago I bought a shell account from someone...I used it one day and all of my accounts were chained ice...
So i think having your own shells and using proxies is definitely a good investment...especially if you wanna RS in magic ...but being restock banned is nothing to worry about. Legit restockers get RS banned as well for refreshing too fast