A few days later (Nov. 10), I was noticing CMonstr tags on North Campus, near the Viking Commons. Prolific amount of tags within The Ridge, and a slow spreading to all points of campus. I wouldn't be surprised to see them in Downtown Bellingham, either.
Below are a ton of pics from The Ridge--I'll point out any that aren't.
Viking Commons, on North Campus
Trash can out front of Viking Commons
Out front of Viking Union
Door on Wilson Library
Post for the Bus-only gate on South end of High Street
West-side of Wilson Library