I don’t bother with stickies, highlighters or X’s and don’t really care if  sign on the wrong line.
We keep a dozen  unrecognizable (retired MD) signature stamps in the office just in case..

It always amazes me that preparers not only Pay fees for e-signatures but spend hours tracking chasing, and complaining about them… 

My clients have never requested e-signature …. My pricing lists e-sign as an option for a $75 additional fee.