>and I refuse to hold even 0.0000000000000001% of them.

You say that, but 0.0000000000000001% of even the world's largest company by market cap (Apple, at 592.44B) would be $0.000000560337

if you ever so much as glance at an ad an evil company runs, then assuming a CPM of $0.01 (two orders of magnitude lower than actual average cost), your single glance is worth $0.00001 or 17 times the value you said you would never hold.

So you'd never hold $0.0000000000000001% of an evil company but you are more than happy to just give them 17 times that value for free by glancing at one of their ads at some point in your life?

You need to lower your purity standards if you don't want to be a hypocrite :)

EDIT: all right, I mixed my metaphor. just think of an evil ad company :)