Crankcase breather question

do glasspacks count as mufflers?
I guess it depends on who you ask; for me, the cops said no. But they gave me 24 hours or something to make the car quieter. I fixed 'em.
This was in the early to mid 70s. I was in my early 20s. I went home, grabbed a strip of cardboard, the corrugated kind, about 3.5 ft wide and rolled it up tight until it just fit into my straight under the axle 2" home-made tailpipes. I cut it into two pieces and jammed one into each pipe. I drilled right thru the whole shebang and stuck a nail in there. I was betting no cop in this area was gonna bend over and look.... and I was right. I got the pass and took off. Around the corner, I pulled the nails and jumped back into the car, nailed the gas and blew the cardboard to the moon. Hyup, I fixed that cop.
I just don't know why they were always picking on me.