...The last three are just noise, if you are VFR and not in Class B or other ATC controlled airspace.
I received them in controlled airspace. The second one was class E, the third one was class C, and the fourth was class D.
And if you are in his airspace, then you have been granted (and accepted) a clearance. Then sure, you need to heed the instructions.
They were not clearances, because no clearance is required to operate in class C or D, only two way radio communications. Class E doesn't even require that for VFR traffic.