I do it (because I buy so little online). Also, Illinois (and maybe other states) published tables saying "if you don't want to calculate it, pay this amount instead."
Most states are now imposing sales tax on online retailers, so the point is pretty much moot now.
I'm one of those weirdos that does pay the use tax. I've been paying it since it became a thing. It continually amazes me that no one else apparently does.