Not so fast. You might not need tinfoil at all.
If this guy was practicing getting on an on ramp while riding an Electra-Glide over and over again, he might be a terrorist practicing the interception of a motorcade. Big flag. Blue lights. Unmarked motorcycle. You do the math.
In point of fact, I might suggest you visit your local FBI Office and report this, in case others have seen the same. The smallest details can be the most important thing.
Be Seeing You,
Chris