there is technically a limit of “too high” E but its so incredibly high you’ll never get anywhere close on normal dosing.
To add to this: The usual joke on /r/transDIY whenever someone manages to miscalculate and do a 10× overdose is “congrats, you are pregnant now”, because E-levels during pregnancy are crazy high. And you don’t exactly see pregnant women dying left and right either, so don’t worry too much.
I saw “driverless waymo” in the title.
Also: Prejudice against people wearing fedoras is still prejudice and thus not really a great thing to have. One of my best friends also likes to wear a hat at times (not sure if it counts as a fedora, I know very little about heads) and is one of the sweetest people I know.