Sure, that happens all the time.
I’d say the picture of what looks like him in a pussyhat with a lady who looks like his girlfriend at an anti-Trump rally is better evidence than these conspiracy theories.
If Paddock participated at that Reno protest, one would think that the search of his Reno home would turn up something. The pink shirt, the pussyhat, photos...
Or is that too much to hope for?