I'm currently Working on a corporate admin site that doesn't need to have lastpass plugin on (a bunch of text inputs to create reports) so why if my form inputs have autocomplete="off" and I forced all my users to Respect AutoComplete=off: allow websites to disable AutoFill it doesn't work. I have many frustrated users.
So what I see is that the best solution to add a custom parameter as suggested here https://lastpass.com/support.php?cmd=showfaq&id=10512
but it doesn't work as it's not W3C compliant at all.
I would appreciate some more information regarding this topic, because as you say in viewtopic.php?f=7&t=204355&p=682645&hilit=disable+input#p718425
it should respect autocomplete off, but as far as I can test, It doesn't, so I think something is broken. Currently using Version 61.0.3163.79 (Official Build) (64-bit)