re: I respect cops 99% of the time

Illegal. Its colloquially called "impeding traffic" in law enforcement circles. Its actually called "obstructing public passages" and everyone is guilty of it 20 times a day but its rarely enforced unless people are being egregious about it.

RS 14:100.1

A. No person shall wilfully obstruct the free, convenient, and normal use of any public...street, highway, bridge, alley, road,...by impeding, hindering, stifling, retarding, or restraining traffic or passage thereon or therein.