I had never heard of color catchers until I came on this board.
I was thought to always sort clothes out by white, light, medium and darks and wash them accordingly so that's what I do with my fabric and have had no problems with anything bleeding over into another piece.
IMHO if you follow the rule of thumb mum thought me you can't go wrong. Wash whites by themself, lights by themself, mediums by themself and darks by themself.
Ever since reading about color catchers in your laundry I've not been able to wrap around my mind how can it do that and still not spill over into the fabrics already in there. If it gets caught by this color catcher surely some of it still goes into the other pieces in there.