Your point about looking weird to the reader reminds me of one incident that I forgot about that happened with the files. There's a notes field that happens to be too small to see much of anything, and one user put in a note that accidentally embedded a linefeed rather than entering the note due to differences in "return" vs "enter" behavior of Labview. It confused people for about a day until they got someone to put in a thumb drive at the source and extract a copy of the original data (most users didn't have much understanding of the data flow). So I'd definitely prefer a way to throw an error or warning for multiple separators.
