Yes, I really do block my tassels. You could say I block just about everything I do that involves yarn! No matter how carefully you wrap and trim your yarn when making a tassel, it will usually need a little grooming to make it hang neat and straight.
This is how I block my tassels:
First, pin the tassel to a blocking board, then spray it with water.
Next, straighten the yarn strands so that they lie flat.
Then, trim the tassel across the bottom to make all of the strands the same length.
After trimming, leave the tassel to dry before removing the pins.