I choose to mail my returns in; if I have to go to the trouble of filling out the forms then some flunky at the other end is going to have to go to the trouble of opening an envelope and reading the forms...
Also, since we have to send a substantial check with our returns, I also send them certified (or whatever it is called) with a return receipt. Arrival at the IRS is delayed a day or so, and there is another small delay as the signature cards are robo signed or whatever they do. The check is cashed several days later than if the returns are just sent regular mail.
Silly, I know, but I get a perverse satisfaction keeping the money in our account a few days longer.