my flame doesnt touch any of my corals leh...not that i want it to
but i guess no two flame is the same..
there are quite a lot of reefers here have flame angels in their tank and also a few that have to give up their flame coz it attack their corals..
as for my flame i juz throw in and pray it wont touch my corals lor..
i think it really depends on luck ar.. there are no sure ways to nt let the flame attack ur corals..
but i think if ur flame angel is already eating whatever u feed it with, maybe the probability of it attacking ur future corals will be lessen..
my two cents..