Yes, this doesn't seem to have changed post C-36. If you look at the list of members logged in it's always been normal for the "guests" to outnumber the "members" by somewhere between 4:1 and 10:1. The lurkers have been here in much larger numbers for years and probably forever.
That's silly; of course they do. LE definitely monitor these boards. In the Saskatchewan section the vice officers have actually weighed in on discussions to explain their priorities and what they're concerned about - example here; read post number 19 on this thread:
http://perb.cc/vbulletin/showthread...-Saskatoon-Bylaw/page2&highlight=vice+officer