@Aspartame @James Lewis 
As concerning Sola Scriptura some also make it legalism so that things like drinking strong drink (undiluted alcohol), abortion, tattoos and playing rock music in church are permissible because despite violating Biblical principles throughout Scripture, they aren't specifically condemned in any New Testament verse (and this practising OT-NT distinction I don't buy into either aside from things specifically identified as prophetic pictures of a more glorious Body).
Misunderstood it also makes KJVonly circular, because you have to go into the historical record rather than letters of Scripture to defend the belief.