At Communion during Daily Mass, two boys – one younger than the other – went up in the communion line with their arms crossed. It seemed like it was about 20 seconds apart from each other; (I’m not sure that they were together.) But in any case, Fr. Wade Menezes did not bless either of them. It looked as if they expected a blessing, but he merely bowed to each of them without touching them.
Now, you can be sure this priest is very particular about liturgical form, so if he was very careful to withhold any physical interaction, I don’t think there’s any doubt that substitute reasons for joining the communion line are not approved, and even less so for EMHC’s.