You never know who you are dealing with..that said it still has plenty of pros and you do get many genuine people around QL too..just gotta stick around and learn the ropes. After awhile you do learn to be more eagle eyed and recognizing alter ids become easier though not always fool proof.
Oh and PS:Blame it on the British English curriculum taught in SL but if it wasn't for a spell checker I would probably be quite incomprehensible too so join the club!