LSD doesn't scale with bodyweight, you take the same amount no matter if you're 100 or 300lbs. Apart from that, 70mcg is a mild dose on context of a regular recreational dose of 150-250mcg, but I agree that 70mcg by itself will absolutely significantly impair an inexperienced user and there is a zero percent chance you would conflate 70mcg with placebo.
in what world is 250ug of lsd considered a “regular recreational” dose? The standard 100-125 that you get on most paper tabs is plenty to have a strong trip for the vast majority of people and 200-250ug is going to be way too strong for everyone except for the most experienced people
I think most people get over-sold blotters. Every now and then there's a study checking how much LSD is actually on sold-as-200ug blotters, and it's typically 60-80. This also leads to heavy overdoses when getting your hands on actual 200ug blotters...
FWIW I once got super high from a bottler. So high that I suspected it was either over dosed or even not LSD. I sent a similar one for analysis. Turned out it was pure LSD and about 125mg as advertised.
I remember that story about Jim Morrison going missing (before a gig or recording or something?) - he was eventually found under a bed, and all he could say was "ten thousand mics!"