I would value your opinion on a matter that troubles me.

I have visited various folk clubs over the years, and sing unaccompanied usually, but not exclusively, english traditional music. Since I have never really built up a solid repetoire of songs, mainly through lack of time to memorise, and a full time 60 hours a week career - I always sing from a song sheet. The tunes I memorise because although I read music I am not in anyway proficient.Frankly, i have never thought that there was anything wrong with this, since a) It gives me more confidence knowing I will not struggle to remember the words-and I have seen many good singers ruin a performance by forgetting the odd verse b) proffessional choruses always have the libretto to hand c)I once sat thru a david bowie performance and he used cue boards all the way thru d) I am strictly amateur does it matter anyway? The reason I ask is because in many clubs this seems to upset people and not just one or two purists but really quite a few . I would value opinions before i go and tell the next person who mentions it to me to bog off.