When taking this verse in contest you will see that Peter and John had just previously been before the Sanhedrin and following their release they prayed with other believers...
. ......"Now Lord, consider their threats and enable your servants to speak your word with great boldness....Stretch our YOUR hand to heal and perform miraculous signs and wonders through the name of your Holy servant Jesus".....following this the meeting was shaken and the Holy Spirit empowered them. Acts 4:29-31.
We then see in chpt.5:15 they indeed 'performed many signs and wonders' among the people as a RESULT people brought the sick into the streets so that at least Peter's "shadow" might fall on them as He passed by."
To them they were looking for a healing, for signs and wonders...which for a time these were done by the Apostles as means of confirming their authority given by God. So no...Peter's shadow was not an intercession nor were they worshiping an idol...they were indeed seeking a healing.
Jesus Himself spoke of people seeking signs and wonders...not in a favorable way I might add. He did say if they couldn't believe then at least believe what He was doing....healing etc. Further he consistently said they were stiff-necked regardless of what they saw and heard...because even with all these many still would not believe....... "blessed is he who believes without seeing"
Course this might be too preachy for you Judith since you seem to oppose that....sufficient for me that these events were not even close to that of worshiping images/idols....though if they had been able to keep Pauls's handkerchief they'd likely had made that an idol of some sort....at least a relic.
But all of that is just YOUR interpretation. Are you Pope CAWW I? Oh, I forgot. You all are your own pope. No wonder Reformers can’t agree on anything.
Do not confuse them with context ..Rome knows they can not handle it..so never does it