They do. I did see them last year or the year before with red helmets and that logo. Don't know if they are back to silver or not.
Notice the other team in that photo...old Chargers jerseys (they're the Thunderbolts).
We also have another local team that has the exact same uniforms, helmets, everything as the Carolina Panthers except the blue is replaced with orange.
Another team that looks JUST like the Eagles older bright green uniforms except they're red and silver.
There's a team that looks like the Michigan Wolverines but are black and orange.
I think a LOT of high schools teams mimic pro and college uniforms...at least until they're harassed by the NFL like this website was.