My COMMON SENSE tells me that the simple fact that Oswald made it out of the Depository building alive and then wandered the streets of Dallas and Oak Cliff taking busses and taxis... proves that he was no patsy.
I can see it now. In the pre-assassination meetings at the Conspiracies 'R' Us offices, the man sitting at the important end of the table decides that it is perfectly okay to allow the patsy to wander around on his own. Laughable.
Isn't it fun to create your own speculative narrative and then dismiss it as laughable.
If there was a conspiracy, Oswald must have been part of it in some way, but - and this is also a speculative scenario - he could well have not been aware of what actually was going on.
If he was the patsy, the evidence would have made him so, regardless if he "escaped" from the TSBD and wandered around town or not.